{"id":10,"date":"2026-06-06T00:18:24","date_gmt":"2026-06-06T00:18:24","guid":{"rendered":"https:\/\/blog.phantram.online\/tinh-phan-tram\/"},"modified":"2026-06-11T01:44:07","modified_gmt":"2026-06-11T01:44:07","slug":"tinh-phan-tram","status":"publish","type":"post","link":"https:\/\/1phantram.com\/blog\/tinh-phan-tram\/","title":{"rendered":"T\u00ednh Ph\u1ea7n Tr\u0103m: H\u01b0\u1edbng D\u1eabn To\u00e0n Di\u1ec7n T\u1eeb A-Z"},"content":{"rendered":"<p><script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"T\u00ednh ph\u1ea7n tr\u0103m c\u1ee7a m\u1ed9t s\u1ed1 nh\u01b0 th\u1ebf n\u00e0o?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"\u0110\u1ec3 t\u00ednh ph\u1ea7n tr\u0103m c\u1ee7a m\u1ed9t s\u1ed1, d\u00f9ng c\u00f4ng th\u1ee9c: K\u1ebft qu\u1ea3 = (Ph\u1ea7n tr\u0103m \/ 100) \u00d7 S\u1ed1. V\u00ed d\u1ee5: 20% c\u1ee7a 150 = (20\/100) \u00d7 150 = 30.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"C\u00f4ng th\u1ee9c t\u00ednh ph\u1ea7n tr\u0103m t\u0103ng gi\u1ea3m l\u00e0 g\u00ec?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"% t\u0103ng\/gi\u1ea3m = ((Gi\u00e1 tr\u1ecb m\u1edbi - Gi\u00e1 tr\u1ecb c\u0169) \/ Gi\u00e1 tr\u1ecb c\u0169) \u00d7 100. K\u1ebft qu\u1ea3 d\u01b0\u01a1ng l\u00e0 t\u0103ng, \u00e2m l\u00e0 gi\u1ea3m.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"L\u00e0m sao t\u00ednh X l\u00e0 bao nhi\u00eau ph\u1ea7n tr\u0103m c\u1ee7a Y?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"D\u00f9ng c\u00f4ng th\u1ee9c: % = (X \/ Y) \u00d7 100. V\u00ed d\u1ee5: 30 l\u00e0 bao nhi\u00eau % c\u1ee7a 150? = (30\/150) \u00d7 100 = 20%.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"T\u00ednh ph\u1ea7n tr\u0103m gi\u1ea3m gi\u00e1 nh\u01b0 th\u1ebf n\u00e0o?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Gi\u00e1 sau gi\u1ea3m = Gi\u00e1 g\u1ed1c \u00d7 (1 - % gi\u1ea3m \/ 100). V\u00ed d\u1ee5: \u00c1o gi\u00e1 500.000\u0111 gi\u1ea3m 30% \u2192 Gi\u00e1 sau = 500.000 \u00d7 (1 - 30\/100) = 350.000\u0111.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"C\u00e1ch t\u00ednh ph\u1ea7n tr\u0103m thu\u1ebf VAT 10%?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Gi\u00e1 \u0111\u00e3 c\u00f3 VAT = Gi\u00e1 ch\u01b0a VAT \u00d7 1,10. Ng\u01b0\u1ee3c l\u1ea1i, gi\u00e1 ch\u01b0a VAT = Gi\u00e1 \u0111\u00e3 c\u00f3 VAT \/ 1,10. V\u00ed d\u1ee5: s\u1ea3n ph\u1ea9m 1.000.000\u0111 ch\u01b0a VAT \u2192 gi\u00e1 cu\u1ed1i = 1.100.000\u0111.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"T\u00ednh ph\u1ea7n tr\u0103m \u0111i\u1ec3m thi nh\u01b0 th\u1ebf n\u00e0o?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"% \u0111i\u1ec3m = (\u0110i\u1ec3m \u0111\u1ea1t \u0111\u01b0\u1ee3c \/ T\u1ed5ng \u0111i\u1ec3m t\u1ed1i \u0111a) \u00d7 100. V\u00ed d\u1ee5: \u0111\u1ea1t 72\/90 \u0111i\u1ec3m = (72\/90) \u00d7 100 = 80%.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"M\u00e1y t\u00ednh Casio t\u00ednh ph\u1ea7n tr\u0103m b\u1eb1ng c\u00e1ch n\u00e0o?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Nh\u1eadp s\u1ed1 c\u1ea7n t\u00ednh, nh\u1ea5n \u00d7 (nh\u00e2n), nh\u1eadp con s\u1ed1 ph\u1ea7n tr\u0103m, nh\u1ea5n ph\u00edm % tr\u00ean m\u00e1y t\u00ednh. V\u00ed d\u1ee5: b\u1ea5m 500 \u00d7 20 % \u2192 ra ngay k\u1ebft qu\u1ea3 100.\"\n      }\n    }\n  ]\n}\n<\/script><\/p>\n<p>B\u1ea1n \u0111ang \u0111\u1ee9ng tr\u01b0\u1edbc t\u1ea5m bi\u1ec3n <strong>&#8220;Gi\u1ea3m gi\u00e1 35%&#8221;<\/strong> nh\u01b0ng kh\u00f4ng bi\u1ebft m\u00ecnh ti\u1ebft ki\u1ec7m \u0111\u01b0\u1ee3c bao nhi\u00eau ti\u1ec1n? Hay \u0111ang nh\u00ecn ch\u1eb1m ch\u1eb1m v\u00e0o b\u1ea3ng \u0111i\u1ec3m v\u00e0 t\u1ef1 h\u1ecfi m\u00ecnh \u0111\u1ea1t bao nhi\u00eau ph\u1ea7n tr\u0103m? Ho\u1eb7c ng\u00e2n h\u00e0ng b\u00e1o l\u00e3i su\u1ea5t 7,5%\/n\u0103m m\u00e0 kh\u00f4ng bi\u1ebft th\u00e1ng n\u00e0y ph\u1ea3i tr\u1ea3 th\u00eam bao nhi\u00eau?<\/p>\n<p><strong>T\u00ednh ph\u1ea7n tr\u0103m<\/strong> l\u00e0 m\u1ed9t trong nh\u1eefng k\u1ef9 n\u0103ng to\u00e1n h\u1ecdc th\u1ef1c t\u1ebf quan tr\u1ecdng nh\u1ea5t trong cu\u1ed9c s\u1ed1ng h\u00e0ng ng\u00e0y \u2014 t\u1eeb mua s\u1eafm, h\u1ecdc t\u1eadp, \u0111\u1ebfn t\u00e0i ch\u00ednh c\u00e1 nh\u00e2n v\u00e0 c\u00f4ng vi\u1ec7c. Th\u1ebf nh\u01b0ng, nhi\u1ec1u ng\u01b0\u1eddi v\u1eabn c\u00f2n l\u00fang t\u00fang m\u1ed7i khi g\u1eb7p b\u00e0i to\u00e1n ph\u1ea7n tr\u0103m.<\/p>\n<p>Trong h\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n n\u00e0y, ch\u00fang t\u00f4i s\u1ebd gi\u1ea3i th\u00edch r\u00f5 r\u00e0ng <strong>t\u1ea5t c\u1ea3 c\u00e1c d\u1ea1ng t\u00ednh ph\u1ea7n tr\u0103m<\/strong> t\u1eeb c\u01a1 b\u1ea3n \u0111\u1ebfn n\u00e2ng cao, k\u00e8m v\u00ed d\u1ee5 th\u1ef1c t\u1ebf, b\u1ea3ng c\u00f4ng th\u1ee9c v\u00e0 m\u1eb9o \u00e1p d\u1ee5ng ngay tr\u00ean m\u00e1y t\u00ednh, \u0111i\u1ec7n tho\u1ea1i hay Excel. Sau khi \u0111\u1ecdc xong, b\u1ea1n s\u1ebd t\u1ef1 tin x\u1eed l\u00fd m\u1ecdi b\u00e0i to\u00e1n ph\u1ea7n tr\u0103m trong cu\u1ed9c s\u1ed1ng.<\/p>\n<div style=\"background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); border-radius: 12px; padding: 24px; margin: 30px 0; text-align: center; color: white;\">\n<h3 style=\"margin: 0 0 10px 0; color: white; font-size: 1.3em;\">\u26a1 Kh\u00f4ng mu\u1ed1n t\u00ednh tay?<\/h3>\n<p style=\"margin: 0 0 16px 0; font-size: 1.05em;\">D\u00f9ng <strong>m\u00e1y t\u00ednh ph\u1ea7n tr\u0103m mi\u1ec5n ph\u00ed<\/strong> t\u1ea1i 1phantram.com \u2014 t\u00ednh nhanh, ch\u00ednh x\u00e1c, kh\u00f4ng c\u1ea7n c\u00e0i \u0111\u1eb7t!<\/p>\n<p>  <a href=\"https:\/\/1phantram.com\" style=\"background: white; color: #667eea; padding: 12px 28px; border-radius: 8px; text-decoration: none; font-weight: bold; font-size: 1.05em; display: inline-block;\">\ud83d\udd22 D\u00f9ng M\u00e1y T\u00ednh % Mi\u1ec5n Ph\u00ed<\/a>\n<\/div>\n<h2>Ph\u1ea7n Tr\u0103m L\u00e0 G\u00ec?<\/h2>\n<p><strong>Ph\u1ea7n tr\u0103m<\/strong> (k\u00fd hi\u1ec7u: <strong>%<\/strong>) l\u00e0 c\u00e1ch bi\u1ec3u di\u1ec5n m\u1ed9t t\u1ef7 l\u1ec7 ho\u1eb7c ph\u1ea7n c\u1ee7a t\u1ed5ng th\u1ec3, trong \u0111\u00f3 t\u1ed5ng th\u1ec3 \u0111\u01b0\u1ee3c coi l\u00e0 <strong>100 ph\u1ea7n b\u1eb1ng nhau<\/strong>. N\u00f3i \u0111\u01a1n gi\u1ea3n, ph\u1ea7n tr\u0103m cho bi\u1ebft &#8220;trong 100 ph\u1ea7n, b\u1ea1n c\u00f3 bao nhi\u00eau ph\u1ea7n&#8221;.<\/p>\n<p>V\u00ed d\u1ee5: 25% c\u00f3 ngh\u0129a l\u00e0 25 tr\u00ean 100, hay n\u00f3i c\u00e1ch kh\u00e1c l\u00e0 \u00bc c\u1ee7a t\u1ed5ng th\u1ec3.<\/p>\n<h3>Ngu\u1ed3n g\u1ed1c l\u1ecbch s\u1eed<\/h3>\n<p>Kh\u00e1i ni\u1ec7m ph\u1ea7n tr\u0103m xu\u1ea5t hi\u1ec7n t\u1eeb th\u1ebf k\u1ef7 15 t\u1ea1i ch\u00e2u \u00c2u, khi c\u00e1c th\u01b0\u01a1ng nh\u00e2n Italy c\u1ea7n t\u00ednh thu\u1ebf v\u00e0 l\u1ee3i nhu\u1eadn theo t\u1ef7 l\u1ec7. Thu\u1eadt ng\u1eef &#8220;per cento&#8221; trong ti\u1ebfng Latin c\u00f3 ngh\u0129a l\u00e0 &#8220;tr\u00ean m\u1ed9t tr\u0103m&#8221;. \u0110\u1ebfn th\u1ebf k\u1ef7 17, k\u00fd hi\u1ec7u <strong>%<\/strong> d\u1ea7n \u0111\u01b0\u1ee3c chu\u1ea9n h\u00f3a v\u00e0 ph\u1ed5 bi\u1ebfn to\u00e0n c\u1ea7u.<\/p>\n<p>Ng\u00e0y nay, ph\u1ea7n tr\u0103m c\u00f3 m\u1eb7t \u1edf kh\u1eafp n\u01a1i: t\u1eeb th\u1ed1ng k\u00ea d\u00e2n s\u1ed1, t\u1ef7 gi\u00e1 ti\u1ec1n t\u1ec7, l\u00e3i su\u1ea5t ng\u00e2n h\u00e0ng, \u0111\u1ebfn ch\u1ec9 s\u1ed1 pin \u0111i\u1ec7n tho\u1ea1i c\u1ee7a b\u1ea1n m\u1ed7i s\u00e1ng th\u1ee9c d\u1eady.<\/p>\n<h2>C\u00f4ng Th\u1ee9c T\u00ednh Ph\u1ea7n Tr\u0103m C\u01a1 B\u1ea3n<\/h2>\n<p>C\u00f3 3 d\u1ea1ng t\u00ednh ph\u1ea7n tr\u0103m c\u01a1 b\u1ea3n nh\u1ea5t m\u00e0 b\u1ea1n c\u1ea7n n\u1eafm v\u1eefng. M\u1ed7i d\u1ea1ng \u0111\u1ec1u c\u00f3 c\u00f4ng th\u1ee9c r\u00f5 r\u00e0ng v\u00e0 \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf ri\u00eang.<\/p>\n<table style=\"width:100%; border-collapse: collapse; margin: 20px 0; font-size: 0.95em;\">\n<thead>\n<tr style=\"background: #4f46e5; color: white;\">\n<th style=\"padding: 12px; text-align: left; border: 1px solid #ddd;\">D\u1ea1ng t\u00ednh<\/th>\n<th style=\"padding: 12px; text-align: left; border: 1px solid #ddd;\">C\u00f4ng th\u1ee9c<\/th>\n<th style=\"padding: 12px; text-align: left; border: 1px solid #ddd;\">V\u00ed d\u1ee5<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background: #f9f9f9;\">\n<td style=\"padding: 10px; border: 1px solid #ddd;\">A% c\u1ee7a B l\u00e0 bao nhi\u00eau?<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">K\u1ebft qu\u1ea3 = (A \/ 100) \u00d7 B<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">20% c\u1ee7a 300 = 60<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">X l\u00e0 bao nhi\u00eau % c\u1ee7a Y?<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">% = (X \/ Y) \u00d7 100<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">60 l\u00e0 20% c\u1ee7a 300<\/td>\n<\/tr>\n<tr style=\"background: #f9f9f9;\">\n<td style=\"padding: 10px; border: 1px solid #ddd;\">% t\u0103ng \/ gi\u1ea3m<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">% = ((M\u1edbi &#8211; C\u0169) \/ C\u0169) \u00d7 100<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">T\u1eeb 200 \u2192 250: t\u0103ng 25%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>T\u00ednh % c\u1ee7a m\u1ed9t s\u1ed1<\/h3>\n<p>\u0110\u00e2y l\u00e0 d\u1ea1ng ph\u1ed5 bi\u1ebfn nh\u1ea5t: <em>&#8220;A% c\u1ee7a B b\u1eb1ng bao nhi\u00eau?&#8221;<\/em><\/p>\n<p><strong>C\u00f4ng th\u1ee9c:<\/strong> <code>K\u1ebft qu\u1ea3 = (A \u00f7 100) \u00d7 B<\/code><\/p>\n<p><strong>V\u00ed d\u1ee5 1:<\/strong> 15% c\u1ee7a 800.000\u0111 l\u00e0 bao nhi\u00eau?<br \/>\n\u2192 (15 \u00f7 100) \u00d7 800.000 = 0,15 \u00d7 800.000 = <strong>120.000\u0111<\/strong><\/p>\n<p><strong>V\u00ed d\u1ee5 2:<\/strong> 7,5% c\u1ee7a 2.000.000\u0111 (ti\u1ec1n l\u00e3i ng\u00e2n h\u00e0ng)?<br \/>\n\u2192 (7,5 \u00f7 100) \u00d7 2.000.000 = 0,075 \u00d7 2.000.000 = <strong>150.000\u0111<\/strong><\/p>\n<p>\ud83d\udca1 <strong>M\u1eb9o nhanh:<\/strong> \u0110\u1ec3 t\u00ednh 10%, ch\u1ec9 c\u1ea7n d\u1eddi d\u1ea5u ph\u1ea9y sang tr\u00e1i 1 ch\u1eef s\u1ed1. 5% = \u00bd c\u1ee7a 10%. 20% = g\u1ea5p \u0111\u00f4i 10%.<\/p>\n<h3>T\u00ednh % t\u0103ng\/gi\u1ea3m<\/h3>\n<p>D\u00f9ng khi b\u1ea1n mu\u1ed1n bi\u1ebft m\u1ed9t gi\u00e1 tr\u1ecb thay \u0111\u1ed5i bao nhi\u00eau ph\u1ea7n tr\u0103m so v\u1edbi ban \u0111\u1ea7u.<\/p>\n<p><strong>C\u00f4ng th\u1ee9c:<\/strong> <code>% thay \u0111\u1ed5i = ((Gi\u00e1 tr\u1ecb m\u1edbi \u2212 Gi\u00e1 tr\u1ecb c\u0169) \u00f7 Gi\u00e1 tr\u1ecb c\u0169) \u00d7 100<\/code><\/p>\n<p><strong>V\u00ed d\u1ee5 t\u0103ng:<\/strong> L\u01b0\u01a1ng th\u00e1ng tr\u01b0\u1edbc 12 tri\u1ec7u, th\u00e1ng n\u00e0y 13,5 tri\u1ec7u. T\u0103ng bao nhi\u00eau %?<br \/>\n\u2192 ((13,5 \u2212 12) \u00f7 12) \u00d7 100 = (1,5 \u00f7 12) \u00d7 100 = <strong>12,5%<\/strong><\/p>\n<p><strong>V\u00ed d\u1ee5 gi\u1ea3m:<\/strong> Gi\u00e1 x\u0103ng t\u1eeb 25.000\u0111 gi\u1ea3m c\u00f2n 22.000\u0111. Gi\u1ea3m bao nhi\u00eau %?<br \/>\n\u2192 ((22.000 \u2212 25.000) \u00f7 25.000) \u00d7 100 = (\u22123.000 \u00f7 25.000) \u00d7 100 = <strong>\u221212%<\/strong> (gi\u1ea3m 12%)<\/p>\n<p>Xem th\u00eam: <a href=\"https:\/\/1phantram.com\/blog\/cach-tinh-phan-tram-tang-giam\/\">H\u01b0\u1edbng d\u1eabn chi ti\u1ebft c\u00e1ch t\u00ednh ph\u1ea7n tr\u0103m t\u0103ng gi\u1ea3m<\/a><\/p>\n<h3>T\u00ednh ng\u01b0\u1ee3c: X l\u00e0 bao nhi\u00eau % c\u1ee7a Y?<\/h3>\n<p>D\u00f9ng khi b\u1ea1n bi\u1ebft hai s\u1ed1 v\u00e0 mu\u1ed1n t\u00ecm t\u1ef7 l\u1ec7 ph\u1ea7n tr\u0103m gi\u1eefa ch\u00fang.<\/p>\n<p><strong>C\u00f4ng th\u1ee9c:<\/strong> <code>% = (X \u00f7 Y) \u00d7 100<\/code><\/p>\n<p><strong>V\u00ed d\u1ee5 1:<\/strong> B\u1ea1n \u0111\u1ea1t 45\/60 \u0111i\u1ec3m trong b\u00e0i ki\u1ec3m tra. \u0110\u1ea1t bao nhi\u00eau %?<br \/>\n\u2192 (45 \u00f7 60) \u00d7 100 = <strong>75%<\/strong><\/p>\n<p><strong>V\u00ed d\u1ee5 2:<\/strong> Trong l\u1edbp 40 h\u1ecdc sinh c\u00f3 14 em \u0111\u1ea1t lo\u1ea1i gi\u1ecfi. T\u1ef7 l\u1ec7 bao nhi\u00eau %?<br \/>\n\u2192 (14 \u00f7 40) \u00d7 100 = <strong>35%<\/strong><\/p>\n<p>Kh\u00e1m ph\u00e1 th\u00eam: <a href=\"https:\/\/1phantram.com\/blog\/cong-thuc-tinh-phan-tram\/\">T\u1ed5ng h\u1ee3p t\u1ea5t c\u1ea3 c\u00f4ng th\u1ee9c t\u00ednh ph\u1ea7n tr\u0103m<\/a><\/p>\n<h2>6 D\u1ea1ng T\u00ednh Ph\u1ea7n Tr\u0103m Th\u01b0\u1eddng G\u1eb7p<\/h2>\n<p>Ph\u1ea7n tr\u0103m xu\u1ea5t hi\u1ec7n trong r\u1ea5t nhi\u1ec1u t\u00ecnh hu\u1ed1ng th\u1ef1c t\u1ebf. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 6 d\u1ea1ng b\u1ea1n s\u1ebd g\u1eb7p th\u01b0\u1eddng xuy\u00ean nh\u1ea5t, k\u00e8m c\u00f4ng th\u1ee9c v\u00e0 v\u00ed d\u1ee5 c\u1ee5 th\u1ec3.<\/p>\n<h3>T\u00ednh % gi\u1ea3m gi\u00e1 khi mua s\u1eafm<\/h3>\n<p>M\u1ed7i m\u00f9a sale l\u00e0 m\u1ed7i l\u1ea7n b\u1ea1n c\u1ea7n t\u00ednh to\u00e1n \u0111\u1ec3 kh\u00f4ng b\u1ecb &#8220;\u1ea3o gi\u00e1c&#8221; gi\u1ea3m gi\u00e1. C\u00f3 3 c\u00f4ng th\u1ee9c c\u1ea7n nh\u1edb:<\/p>\n<p><strong>S\u1ed1 ti\u1ec1n ti\u1ebft ki\u1ec7m \u0111\u01b0\u1ee3c:<\/strong> <code>S\u1ed1 ti\u1ec1n gi\u1ea3m = Gi\u00e1 g\u1ed1c \u00d7 (% gi\u1ea3m \u00f7 100)<\/code><\/p>\n<p><strong>Gi\u00e1 sau khi gi\u1ea3m:<\/strong> <code>Gi\u00e1 m\u1edbi = Gi\u00e1 g\u1ed1c \u00d7 (1 \u2212 % gi\u1ea3m \u00f7 100)<\/code><\/p>\n<p><strong>T\u00ednh % gi\u1ea3m:<\/strong> <code>% gi\u1ea3m = ((Gi\u00e1 g\u1ed1c \u2212 Gi\u00e1 m\u1edbi) \u00f7 Gi\u00e1 g\u1ed1c) \u00d7 100<\/code><\/p>\n<p><strong>V\u00ed d\u1ee5 th\u1ef1c t\u1ebf:<\/strong> Chi\u1ebfc \u00e1o gi\u00e1 g\u1ed1c 650.000\u0111, \u0111ang sale 40%.<\/p>\n<ul>\n<li>S\u1ed1 ti\u1ec1n gi\u1ea3m = 650.000 \u00d7 0,40 = <strong>260.000\u0111<\/strong><\/li>\n<li>Gi\u00e1 sau gi\u1ea3m = 650.000 \u00d7 0,60 = <strong>390.000\u0111<\/strong><\/li>\n<\/ul>\n<p>\ud83d\uded2 <strong>L\u01b0u \u00fd:<\/strong> N\u1ebfu c\u00f3 th\u00eam voucher gi\u1ea3m 10% tr\u00ean gi\u00e1 \u0111\u00e3 gi\u1ea3m, gi\u00e1 cu\u1ed1i = 390.000 \u00d7 0,90 = <strong>351.000\u0111<\/strong> (kh\u00f4ng ph\u1ea3i 650.000 \u00d7 50% = 325.000\u0111). \u0110\u00e2y l\u00e0 l\u1ed7i nhi\u1ec1u ng\u01b0\u1eddi nh\u1ea7m!<\/p>\n<p>\u0110\u1ecdc th\u00eam: <a href=\"https:\/\/1phantram.com\/blog\/tinh-phan-tram-giam-gia\/\">C\u00e1ch t\u00ednh ph\u1ea7n tr\u0103m gi\u1ea3m gi\u00e1 ch\u00ednh x\u00e1c nh\u1ea5t<\/a><\/p>\n<h3>T\u00ednh % l\u00e3i su\u1ea5t ng\u00e2n h\u00e0ng<\/h3>\n<p>L\u00e3i su\u1ea5t ng\u00e2n h\u00e0ng th\u01b0\u1eddng \u0111\u01b0\u1ee3c t\u00ednh theo n\u0103m (p.a \u2014 per annum). \u0110\u1ec3 t\u00ednh l\u00e3i th\u1ef1c t\u1ebf, b\u1ea1n c\u1ea7n quy \u0111\u1ed5i v\u1ec1 k\u1ef3 h\u1ea1n th\u1ef1c.<\/p>\n<p><strong>C\u00f4ng th\u1ee9c l\u00e3i \u0111\u01a1n:<\/strong> <code>Ti\u1ec1n l\u00e3i = V\u1ed1n g\u1ed1c \u00d7 (L\u00e3i su\u1ea5t % \u00f7 100) \u00d7 (S\u1ed1 ng\u00e0y \u00f7 365)<\/code><\/p>\n<p><strong>V\u00ed d\u1ee5:<\/strong> G\u1eedi ti\u1ebft ki\u1ec7m 50.000.000\u0111, l\u00e3i su\u1ea5t 6%\/n\u0103m, k\u1ef3 h\u1ea1n 6 th\u00e1ng (182 ng\u00e0y):<\/p>\n<ul>\n<li>Ti\u1ec1n l\u00e3i = 50.000.000 \u00d7 0,06 \u00d7 (182 \u00f7 365) = <strong>1.495.890\u0111<\/strong><\/li>\n<li>T\u1ed5ng nh\u1eadn v\u1ec1 = 50.000.000 + 1.495.890 = <strong>51.495.890\u0111<\/strong><\/li>\n<\/ul>\n<p>T\u00ecm hi\u1ec3u s\u00e2u h\u01a1n: <a href=\"https:\/\/1phantram.com\/blog\/tinh-lai-suat-ngan-hang\/\">H\u01b0\u1edbng d\u1eabn t\u00ednh l\u00e3i su\u1ea5t ng\u00e2n h\u00e0ng chi ti\u1ebft<\/a> | <a href=\"https:\/\/1phantram.com\/blog\/lai-kep-la-gi\/\">L\u00e3i k\u00e9p l\u00e0 g\u00ec v\u00e0 c\u00e1ch t\u00ednh<\/a><\/p>\n<h3>T\u00ednh % \u0111i\u1ec3m thi \/ h\u1ecdc b\u1ea1<\/h3>\n<p>Quy \u0111\u1ed5i \u0111i\u1ec3m thi sang ph\u1ea7n tr\u0103m gi\u00fap b\u1ea1n \u0111\u00e1nh gi\u00e1 \u0111\u01b0\u1ee3c m\u1ee9c \u0111\u1ed9 \u0111\u1ea1t y\u00eau c\u1ea7u v\u00e0 so s\u00e1nh gi\u1eefa c\u00e1c m\u00f4n h\u1ecdc.<\/p>\n<p><strong>C\u00f4ng th\u1ee9c:<\/strong> <code>% \u0111i\u1ec3m = (\u0110i\u1ec3m \u0111\u1ea1t \u00f7 T\u1ed5ng \u0111i\u1ec3m t\u1ed1i \u0111a) \u00d7 100<\/code><\/p>\n<p><strong>V\u00ed d\u1ee5 1:<\/strong> B\u00e0i thi 90 c\u00e2u tr\u1eafc nghi\u1ec7m, \u0111\u00fang 72 c\u00e2u:<br \/>\n\u2192 (72 \u00f7 90) \u00d7 100 = <strong>80%<\/strong><\/p>\n<p><strong>V\u00ed d\u1ee5 2:<\/strong> \u0110i\u1ec3m trung b\u00ecnh h\u1ecdc k\u1ef3 7,8\/10:<br \/>\n\u2192 (7,8 \u00f7 10) \u00d7 100 = <strong>78%<\/strong> \u2014 \u0111\u1ea1t lo\u1ea1i Kh\u00e1<\/p>\n<p><strong>B\u1ea3ng x\u1ebfp lo\u1ea1i theo ph\u1ea7n tr\u0103m:<\/strong><\/p>\n<table style=\"width:100%; border-collapse: collapse; margin: 15px 0;\">\n<tr style=\"background: #4f46e5; color: white;\">\n<th style=\"padding: 10px; border: 1px solid #ddd;\">Ph\u1ea7n tr\u0103m<\/th>\n<th style=\"padding: 10px; border: 1px solid #ddd;\">X\u1ebfp lo\u1ea1i<\/th>\n<\/tr>\n<tr style=\"background: #f0fdf4;\">\n<td style=\"padding: 8px; border: 1px solid #ddd;\">90% \u2013 100%<\/td>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">Xu\u1ea5t s\u1eafc<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">80% \u2013 89%<\/td>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">Gi\u1ecfi<\/td>\n<\/tr>\n<tr style=\"background: #f9f9f9;\">\n<td style=\"padding: 8px; border: 1px solid #ddd;\">65% \u2013 79%<\/td>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">Kh\u00e1<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">50% \u2013 64%<\/td>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">Trung b\u00ecnh<\/td>\n<\/tr>\n<tr style=\"background: #fff1f2;\">\n<td style=\"padding: 8px; border: 1px solid #ddd;\">D\u01b0\u1edbi 50%<\/td>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">Kh\u00f4ng \u0111\u1ea1t<\/td>\n<\/tr>\n<\/table>\n<p>Chi ti\u1ebft h\u01a1n: <a href=\"https:\/\/1phantram.com\/blog\/tinh-phan-tram-diem-thi\/\">C\u00e1ch t\u00ednh ph\u1ea7n tr\u0103m \u0111i\u1ec3m thi v\u00e0 quy \u0111\u1ed5i x\u1ebfp lo\u1ea1i<\/a><\/p>\n<h3>T\u00ednh % ho\u00e0n th\u00e0nh c\u00f4ng vi\u1ec7c<\/h3>\n<p>Trong qu\u1ea3n l\u00fd d\u1ef1 \u00e1n, theo d\u00f5i ti\u1ebfn \u0111\u1ed9 theo ph\u1ea7n tr\u0103m gi\u00fap b\u1ea1n bi\u1ebft ch\u00ednh x\u00e1c m\u00ecnh \u0111ang \u1edf \u0111\u00e2u tr\u00ean h\u00e0nh tr\u00ecnh \u0111\u1ebfn \u0111\u00edch.<\/p>\n<p><strong>C\u00f4ng th\u1ee9c:<\/strong> <code>% ho\u00e0n th\u00e0nh = (S\u1ed1 vi\u1ec7c \u0111\u00e3 xong \u00f7 T\u1ed5ng s\u1ed1 vi\u1ec7c c\u1ea7n l\u00e0m) \u00d7 100<\/code><\/p>\n<p><strong>V\u00ed d\u1ee5 1 (s\u1ed1 \u0111\u1ea7u vi\u1ec7c):<\/strong> Sprint c\u00f3 20 task, \u0111\u00e3 ho\u00e0n th\u00e0nh 15:<br \/>\n\u2192 (15 \u00f7 20) \u00d7 100 = <strong>75%<\/strong><\/p>\n<p><strong>V\u00ed d\u1ee5 2 (theo th\u1eddi gian):<\/strong> D\u1ef1 \u00e1n 90 ng\u00e0y, \u0111\u00e3 qua 54 ng\u00e0y:<br \/>\n\u2192 (54 \u00f7 90) \u00d7 100 = <strong>60%<\/strong> th\u1eddi gian \u0111\u00e3 tr\u00f4i qua<\/p>\n<p><strong>V\u00ed d\u1ee5 3 (theo KPI):<\/strong> Doanh s\u1ed1 m\u1ee5c ti\u00eau 500 tri\u1ec7u, \u0111\u00e3 \u0111\u1ea1t 380 tri\u1ec7u:<br \/>\n\u2192 (380 \u00f7 500) \u00d7 100 = <strong>76%<\/strong> ho\u00e0n th\u00e0nh ch\u1ec9 ti\u00eau<\/p>\n<h3>T\u00ednh % thu\u1ebf VAT<\/h3>\n<p>Thu\u1ebf gi\u00e1 tr\u1ecb gia t\u0103ng (VAT) t\u1ea1i Vi\u1ec7t Nam hi\u1ec7n nay ph\u1ed5 bi\u1ebfn \u1edf m\u1ee9c <strong>10%<\/strong> (m\u1ed9t s\u1ed1 h\u00e0ng h\u00f3a thi\u1ebft y\u1ebfu l\u00e0 5% ho\u1eb7c 0%).<\/p>\n<p><strong>C\u1ed9ng VAT v\u00e0o gi\u00e1:<\/strong> <code>Gi\u00e1 c\u00f3 VAT = Gi\u00e1 ch\u01b0a VAT \u00d7 (1 + VAT%\/100)<\/code><br \/>\n\u2192 V\u00ed d\u1ee5: D\u1ecbch v\u1ee5 2.000.000\u0111 ch\u01b0a VAT \u2192 Gi\u00e1 c\u00f3 VAT = 2.000.000 \u00d7 1,10 = <strong>2.200.000\u0111<\/strong><\/p>\n<p><strong>T\u00e1ch VAT ra kh\u1ecfi gi\u00e1 \u0111\u00e3 bao g\u1ed3m:<\/strong> <code>VAT = Gi\u00e1 c\u00f3 VAT \u00d7 (VAT% \u00f7 (100 + VAT%))<\/code><br \/>\n\u2192 V\u00ed d\u1ee5: H\u00f3a \u0111\u01a1n 2.200.000\u0111 \u0111\u00e3 g\u1ed3m VAT 10% \u2192 Ti\u1ec1n VAT = 2.200.000 \u00d7 (10\/110) = <strong>200.000\u0111<\/strong><\/p>\n<h3>T\u00ednh % dinh d\u01b0\u1ee1ng<\/h3>\n<p>Nh\u00ecn v\u00e0o nh\u00e3n th\u1ef1c ph\u1ea9m, b\u1ea1n th\u01b0\u1eddng th\u1ea5y &#8220;%DV&#8221; (% Gi\u00e1 tr\u1ecb H\u00e0ng ng\u00e0y). Con s\u1ed1 n\u00e0y cho bi\u1ebft m\u1ed9t kh\u1ea9u ph\u1ea7n cung c\u1ea5p bao nhi\u00eau ph\u1ea7n tr\u0103m nhu c\u1ea7u dinh d\u01b0\u1ee1ng h\u00e0ng ng\u00e0y \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb.<\/p>\n<p><strong>C\u00f4ng th\u1ee9c:<\/strong> <code>%DV = (L\u01b0\u1ee3ng ch\u1ea5t dinh d\u01b0\u1ee1ng trong 1 kh\u1ea9u ph\u1ea7n \u00f7 L\u01b0\u1ee3ng khuy\u1ebfn ngh\u1ecb h\u00e0ng ng\u00e0y) \u00d7 100<\/code><\/p>\n<p><strong>V\u00ed d\u1ee5:<\/strong> M\u1ed9t h\u1ed9p s\u1eefa ch\u1ee9a 300mg Canxi. Nhu c\u1ea7u canxi h\u00e0ng ng\u00e0y l\u00e0 1.000mg.<br \/>\n\u2192 %DV Canxi = (300 \u00f7 1.000) \u00d7 100 = <strong>30%<\/strong><\/p>\n<p>\ud83d\udca1 <strong>Quy t\u1eafc nhanh:<\/strong> %DV \u2265 20% l\u00e0 gi\u00e0u ch\u1ea5t dinh d\u01b0\u1ee1ng \u0111\u00f3; %DV \u2264 5% l\u00e0 th\u1ea5p.<\/p>\n<h2>C\u00e1ch T\u00ednh Ph\u1ea7n Tr\u0103m Tr\u00ean C\u00e1c Thi\u1ebft B\u1ecb<\/h2>\n<p>Bi\u1ebft c\u00f4ng th\u1ee9c l\u00e0 t\u1ed1t, nh\u01b0ng trong th\u1ef1c t\u1ebf b\u1ea1n s\u1ebd mu\u1ed1n t\u00ednh nhanh b\u1eb1ng thi\u1ebft b\u1ecb. \u0110\u00e2y l\u00e0 h\u01b0\u1edbng d\u1eabn cho 3 thi\u1ebft b\u1ecb ph\u1ed5 bi\u1ebfn nh\u1ea5t.<\/p>\n<h3>T\u00ednh % tr\u00ean m\u00e1y t\u00ednh Casio<\/h3>\n<p>H\u1ea7u h\u1ebft m\u00e1y t\u00ednh Casio d\u00f2ng fx \u0111\u1ec1u c\u00f3 ph\u00edm <strong>%<\/strong> chuy\u00ean d\u1ee5ng.<\/p>\n<p><strong>C\u00e1ch t\u00ednh A% c\u1ee7a B:<\/strong><\/p>\n<ol>\n<li>Nh\u1eadp B (v\u00ed d\u1ee5: 500)<\/li>\n<li>Nh\u1ea5n ph\u00edm <strong>\u00d7<\/strong><\/li>\n<li>Nh\u1eadp A (v\u00ed d\u1ee5: 20)<\/li>\n<li>Nh\u1ea5n ph\u00edm <strong>%<\/strong> \u2192 Hi\u1ec3n th\u1ecb ngay k\u1ebft qu\u1ea3: <strong>100<\/strong><\/li>\n<\/ol>\n<p><strong>C\u00e1ch t\u00ednh gi\u00e1 sau gi\u1ea3m (v\u00ed d\u1ee5: 500.000\u0111 gi\u1ea3m 25%):<\/strong><\/p>\n<ol>\n<li>Nh\u1eadp 500000<\/li>\n<li>Nh\u1ea5n <strong>\u2212<\/strong><\/li>\n<li>Nh\u1eadp 25<\/li>\n<li>Nh\u1ea5n <strong>%<\/strong> \u2192 K\u1ebft qu\u1ea3: <strong>375.000<\/strong><\/li>\n<\/ol>\n<p><strong>L\u01b0u \u00fd:<\/strong> M\u1ed9t s\u1ed1 d\u00f2ng Casio c\u0169 (nh\u01b0 fx-82MS) khi nh\u1ea5n % sau ph\u00e9p tr\u1eeb s\u1ebd t\u1ef1 t\u00ednh 25% c\u1ee7a s\u1ed1 \u0111\u1ea7u ti\u00ean r\u1ed3i tr\u1eeb \u0111i \u2014 k\u1ebft qu\u1ea3 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng nh\u01b0ng c\u00e1ch hi\u1ec3n th\u1ecb kh\u00e1c nhau.<\/p>\n<p>Xem th\u00eam: <a href=\"https:\/\/1phantram.com\/blog\/tinh-phan-tram-tren-may-tinh\/\">H\u01b0\u1edbng d\u1eabn t\u00ednh ph\u1ea7n tr\u0103m tr\u00ean m\u00e1y t\u00ednh b\u1ecf t\u00fai c\u00e1c lo\u1ea1i<\/a><\/p>\n<h3>T\u00ednh % tr\u00ean Excel<\/h3>\n<p>Excel l\u00e0 c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd cho t\u00ednh to\u00e1n ph\u1ea7n tr\u0103m h\u00e0ng lo\u1ea1t. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c c\u00f4ng th\u1ee9c Excel hay d\u00f9ng nh\u1ea5t:<\/p>\n<table style=\"width:100%; border-collapse: collapse; margin: 15px 0;\">\n<tr style=\"background: #217346; color: white;\">\n<th style=\"padding: 10px; border: 1px solid #ddd;\">B\u00e0i to\u00e1n<\/th>\n<th style=\"padding: 10px; border: 1px solid #ddd;\">C\u00f4ng th\u1ee9c Excel<\/th>\n<th style=\"padding: 10px; border: 1px solid #ddd;\">V\u00ed d\u1ee5 (A1=500, B1=20)<\/th>\n<\/tr>\n<tr style=\"background: #f9f9f9;\">\n<td style=\"padding: 8px; border: 1px solid #ddd;\">B1% c\u1ee7a A1<\/td>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">=A1*B1%<\/td>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">=500*20% \u2192 100<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">A1 l\u00e0 bao nhi\u00eau % c\u1ee7a C1<\/td>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">=A1\/C1<\/td>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">=100\/500 \u2192 \u0111\u1ecbnh d\u1ea1ng % \u2192 20%<\/td>\n<\/tr>\n<tr style=\"background: #f9f9f9;\">\n<td style=\"padding: 8px; border: 1px solid #ddd;\">% thay \u0111\u1ed5i t\u1eeb A1 sang B1<\/td>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">=(B1-A1)\/A1<\/td>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">=(600-500)\/500 \u2192 20%<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">T\u0103ng A1 th\u00eam B1%<\/td>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">=A1*(1+B1%)<\/td>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">=500*(1+20%) \u2192 600<\/td>\n<\/tr>\n<tr style=\"background: #f9f9f9;\">\n<td style=\"padding: 8px; border: 1px solid #ddd;\">Gi\u1ea3m A1 \u0111i B1%<\/td>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">=A1*(1-B1%)<\/td>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">=500*(1-20%) \u2192 400<\/td>\n<\/tr>\n<\/table>\n<p>\ud83d\udca1 <strong>M\u1eb9o Excel:<\/strong> Sau khi nh\u1eadp c\u00f4ng th\u1ee9c chia (=A1\/C1), nh\u1ea5n <strong>Ctrl+Shift+%<\/strong> \u0111\u1ec3 \u0111\u1ecbnh d\u1ea1ng \u00f4 th\u00e0nh ph\u1ea7n tr\u0103m ngay l\u1eadp t\u1ee9c.<\/p>\n<h3>T\u00ednh % tr\u00ean \u0111i\u1ec7n tho\u1ea1i<\/h3>\n<p>M\u00e1y t\u00ednh m\u1eb7c \u0111\u1ecbnh tr\u00ean \u0111i\u1ec7n tho\u1ea1i th\u00f4ng minh \u0111\u1ec1u c\u00f3 th\u1ec3 t\u00ednh ph\u1ea7n tr\u0103m, nh\u01b0ng c\u00e1ch d\u00f9ng h\u01a1i kh\u00e1c nhau gi\u1eefa Android v\u00e0 iOS:<\/p>\n<p><strong>Tr\u00ean Android (m\u00e1y t\u00ednh Google):<\/strong><br \/>\nNh\u1eadp s\u1ed1 \u2192 nh\u1ea5n \u00d7 \u2192 nh\u1eadp % \u2192 nh\u1ea5n <strong>%<\/strong> (c\u00f3 trong m\u00e1y t\u00ednh m\u1edf r\u1ed9ng) \u2192 nh\u1ea5n = \u0111\u1ec3 ra k\u1ebft qu\u1ea3.<br \/>\nHo\u1eb7c \u0111\u01a1n gi\u1ea3n: g\u00f5 v\u00e0o Google Search <em>&#8220;20% c\u1ee7a 500000&#8221;<\/em> \u2192 Google t\u1ef1 t\u00ednh.<\/p>\n<p><strong>Tr\u00ean iPhone (m\u00e1y t\u00ednh Calculator):<\/strong><br \/>\nNh\u1eadp s\u1ed1 \u2192 nh\u1ea5n \u00d7 \u2192 nh\u1eadp ph\u1ea7n tr\u0103m \u2192 nh\u1ea5n ph\u00edm <strong>%<\/strong> \u2192 nh\u1ea5n =.<br \/>\nV\u00ed d\u1ee5: 500.000 \u00d7 20 % = \u2192 ra ngay <strong>100.000<\/strong>.<\/p>\n<p><strong>C\u00e1ch nhanh nh\u1ea5t:<\/strong> D\u00f9ng <a href=\"https:\/\/1phantram.com\">1phantram.com<\/a> \u2014 giao di\u1ec7n t\u1ed1i \u01b0u cho mobile, kh\u00f4ng c\u1ea7n nh\u1edb c\u00f4ng th\u1ee9c, ch\u1ec9 c\u1ea7n \u0111i\u1ec1n s\u1ed1 v\u00e0 ch\u1ecdn lo\u1ea1i t\u00ednh.<\/p>\n<h2>C\u00e1c L\u1ed7i Th\u01b0\u1eddng G\u1eb7p Khi T\u00ednh Ph\u1ea7n Tr\u0103m<\/h2>\n<p>D\u00f9 t\u00ednh ph\u1ea7n tr\u0103m c\u00f3 v\u1ebb \u0111\u01a1n gi\u1ea3n, c\u00f3 m\u1ed9t s\u1ed1 l\u1ed7i r\u1ea5t ph\u1ed5 bi\u1ebfn khi\u1ebfn k\u1ebft qu\u1ea3 sai ho\u00e0n to\u00e0n. H\u00e3y ch\u00fa \u00fd tr\u00e1nh nh\u1eefng l\u1ed7i n\u00e0y:<\/p>\n<h3>L\u1ed7i 1: C\u1ed9ng d\u1ed3n ph\u1ea7n tr\u0103m kh\u00f4ng \u0111\u00fang c\u00e1ch<\/h3>\n<p>\u274c <strong>Sai:<\/strong> Gi\u1ea3m 30% r\u1ed3i gi\u1ea3m th\u00eam 20% = gi\u1ea3m 50%<br \/>\n\u2705 <strong>\u0110\u00fang:<\/strong> Gi\u00e1 c\u00f2n 70%, sau \u0111\u00f3 c\u00f2n 80% c\u1ee7a 70% = 56% \u2192 t\u1ee9c gi\u1ea3m 44%, kh\u00f4ng ph\u1ea3i 50%<\/p>\n<h3>L\u1ed7i 2: T\u00ednh % tr\u00ean m\u1eabu s\u1ed1 sai<\/h3>\n<p>\u274c <strong>Sai:<\/strong> T\u0103ng t\u1eeb 100 l\u00ean 120 l\u00e0 t\u0103ng 20, r\u1ed3i t\u00ednh (20 \u00f7 120) \u00d7 100 = 16,7%<br \/>\n\u2705 <strong>\u0110\u00fang:<\/strong> % t\u0103ng lu\u00f4n t\u00ednh tr\u00ean <em>gi\u00e1 tr\u1ecb c\u0169 (g\u1ed1c)<\/em>: (20 \u00f7 100) \u00d7 100 = <strong>20%<\/strong><\/p>\n<h3>L\u1ed7i 3: Nh\u1ea7m &#8220;gi\u1ea3m X%&#8221; v\u1edbi &#8220;c\u00f2n X%&#8221;<\/h3>\n<p>\u274c <strong>Sai:<\/strong> Gi\u1ea3m 30% \u2192 c\u00f2n 30%<br \/>\n\u2705 <strong>\u0110\u00fang:<\/strong> Gi\u1ea3m 30% \u2192 c\u00f2n 100% \u2212 30% = <strong>70%<\/strong><\/p>\n<h3>L\u1ed7i 4: Kh\u00f4ng quy \u0111\u1ed5i \u0111\u01a1n v\u1ecb th\u1eddi gian khi t\u00ednh l\u00e3i su\u1ea5t<\/h3>\n<p>\u274c <strong>Sai:<\/strong> L\u00e3i su\u1ea5t 12%\/n\u0103m, g\u1eedi 3 th\u00e1ng, t\u00ednh th\u1eb3ng: V\u1ed1n \u00d7 12%<br \/>\n\u2705 <strong>\u0110\u00fang:<\/strong> Ph\u1ea3i quy \u0111\u1ed5i: V\u1ed1n \u00d7 12% \u00d7 (3\/12) = V\u1ed1n \u00d7 3%<\/p>\n<h3>L\u1ed7i 5: T\u01b0\u1edfng t\u0103ng 50% r\u1ed3i gi\u1ea3m 50% l\u00e0 v\u1ec1 l\u1ea1i \u0111i\u1ec3m ban \u0111\u1ea7u<\/h3>\n<p>\u274c <strong>Sai:<\/strong> 100 t\u0103ng 50% \u2192 150; 150 gi\u1ea3m 50% \u2192 75 (kh\u00f4ng ph\u1ea3i 100!)<br \/>\n\u2705 <strong>\u0110\u00fang:<\/strong> T\u0103ng r\u1ed3i gi\u1ea3m c\u00f9ng % s\u1ebd cho k\u1ebft qu\u1ea3 th\u1ea5p h\u01a1n ban \u0111\u1ea7u. C\u1ee5 th\u1ec3: 100 \u00d7 1,5 \u00d7 0,5 = 75.<\/p>\n<h3>L\u1ed7i 6: L\u00e0m tr\u00f2n s\u1ed1 trung gian qu\u00e1 s\u1edbm<\/h3>\n<p>Khi t\u00ednh nhi\u1ec1u b\u01b0\u1edbc, h\u00e3y gi\u1eef to\u00e0n b\u1ed9 ch\u1eef s\u1ed1 th\u1eadp ph\u00e2n \u0111\u1ebfn b\u01b0\u1edbc cu\u1ed1i c\u00f9ng r\u1ed3i m\u1edbi l\u00e0m tr\u00f2n. L\u00e0m tr\u00f2n gi\u1eefa ch\u1eebng t\u00edch l\u0169y sai s\u1ed1, \u0111\u1eb7c bi\u1ec7t trong t\u00e0i ch\u00ednh.<\/p>\n<h2>FAQ \u2014 C\u00e2u H\u1ecfi Th\u01b0\u1eddng G\u1eb7p<\/h2>\n<div style=\"background: #f8f9fa; border-left: 4px solid #4f46e5; padding: 16px 20px; margin: 15px 0; border-radius: 0 8px 8px 0;\">\n<h3 style=\"margin-top: 0; color: #4f46e5;\">\u2753 T\u00ednh ph\u1ea7n tr\u0103m c\u1ee7a m\u1ed9t s\u1ed1 nh\u01b0 th\u1ebf n\u00e0o?<\/h3>\n<p style=\"margin-bottom: 0;\">D\u00f9ng c\u00f4ng th\u1ee9c: <strong>K\u1ebft qu\u1ea3 = (Ph\u1ea7n tr\u0103m \u00f7 100) \u00d7 S\u1ed1<\/strong>. V\u00ed d\u1ee5: 20% c\u1ee7a 150 = (20 \u00f7 100) \u00d7 150 = <strong>30<\/strong>. Ho\u1eb7c \u0111\u01a1n gi\u1ea3n h\u01a1n: nh\u00e2n s\u1ed1 v\u1edbi 0,20.<\/p>\n<\/div>\n<div style=\"background: #f8f9fa; border-left: 4px solid #4f46e5; padding: 16px 20px; margin: 15px 0; border-radius: 0 8px 8px 0;\">\n<h3 style=\"margin-top: 0; color: #4f46e5;\">\u2753 C\u00f4ng th\u1ee9c t\u00ednh ph\u1ea7n tr\u0103m t\u0103ng gi\u1ea3m l\u00e0 g\u00ec?<\/h3>\n<p style=\"margin-bottom: 0;\"><strong>% thay \u0111\u1ed5i = ((Gi\u00e1 tr\u1ecb m\u1edbi \u2212 Gi\u00e1 tr\u1ecb c\u0169) \u00f7 Gi\u00e1 tr\u1ecb c\u0169) \u00d7 100<\/strong>. K\u1ebft qu\u1ea3 d\u01b0\u01a1ng l\u00e0 t\u0103ng, \u00e2m l\u00e0 gi\u1ea3m. L\u01b0u \u00fd: lu\u00f4n chia cho gi\u00e1 tr\u1ecb <em>c\u0169<\/em> (ban \u0111\u1ea7u), kh\u00f4ng ph\u1ea3i gi\u00e1 tr\u1ecb m\u1edbi.<\/p>\n<\/div>\n<div style=\"background: #f8f9fa; border-left: 4px solid #4f46e5; padding: 16px 20px; margin: 15px 0; border-radius: 0 8px 8px 0;\">\n<h3 style=\"margin-top: 0; color: #4f46e5;\">\u2753 L\u00e0m sao t\u00ednh X l\u00e0 bao nhi\u00eau ph\u1ea7n tr\u0103m c\u1ee7a Y?<\/h3>\n<p style=\"margin-bottom: 0;\">D\u00f9ng c\u00f4ng th\u1ee9c: <strong>% = (X \u00f7 Y) \u00d7 100<\/strong>. V\u00ed d\u1ee5: 30 l\u00e0 bao nhi\u00eau % c\u1ee7a 150? = (30 \u00f7 150) \u00d7 100 = <strong>20%<\/strong>.<\/p>\n<\/div>\n<div style=\"background: #f8f9fa; border-left: 4px solid #4f46e5; padding: 16px 20px; margin: 15px 0; border-radius: 0 8px 8px 0;\">\n<h3 style=\"margin-top: 0; color: #4f46e5;\">\u2753 T\u00ednh ph\u1ea7n tr\u0103m gi\u1ea3m gi\u00e1 nh\u01b0 th\u1ebf n\u00e0o?<\/h3>\n<p style=\"margin-bottom: 0;\"><strong>Gi\u00e1 sau gi\u1ea3m = Gi\u00e1 g\u1ed1c \u00d7 (1 \u2212 % gi\u1ea3m \u00f7 100)<\/strong>. V\u00ed d\u1ee5: \u00c1o 500.000\u0111 gi\u1ea3m 30% \u2192 Gi\u00e1 sau = 500.000 \u00d7 0,70 = <strong>350.000\u0111<\/strong>. Ti\u1ebft ki\u1ec7m \u0111\u01b0\u1ee3c: 150.000\u0111.<\/p>\n<\/div>\n<div style=\"background: #f8f9fa; border-left: 4px solid #4f46e5; padding: 16px 20px; margin: 15px 0; border-radius: 0 8px 8px 0;\">\n<h3 style=\"margin-top: 0; color: #4f46e5;\">\u2753 C\u00e1ch t\u00ednh ph\u1ea7n tr\u0103m thu\u1ebf VAT 10%?<\/h3>\n<p style=\"margin-bottom: 0;\"><strong>Gi\u00e1 \u0111\u00e3 c\u00f3 VAT = Gi\u00e1 ch\u01b0a VAT \u00d7 1,10<\/strong>. \u0110\u1ec3 t\u00e1ch VAT ra: <strong>Ti\u1ec1n VAT = Gi\u00e1 c\u00f3 VAT \u00f7 11<\/strong>. V\u00ed d\u1ee5: s\u1ea3n ph\u1ea9m 1.100.000\u0111 \u0111\u00e3 g\u1ed3m VAT 10% \u2192 Ti\u1ec1n VAT = 1.100.000 \u00f7 11 = <strong>100.000\u0111<\/strong>.<\/p>\n<\/div>\n<div style=\"background: #f8f9fa; border-left: 4px solid #4f46e5; padding: 16px 20px; margin: 15px 0; border-radius: 0 8px 8px 0;\">\n<h3 style=\"margin-top: 0; color: #4f46e5;\">\u2753 T\u00ednh ph\u1ea7n tr\u0103m \u0111i\u1ec3m thi nh\u01b0 th\u1ebf n\u00e0o?<\/h3>\n<p style=\"margin-bottom: 0;\"><strong>% \u0111i\u1ec3m = (\u0110i\u1ec3m \u0111\u1ea1t \u0111\u01b0\u1ee3c \u00f7 T\u1ed5ng \u0111i\u1ec3m t\u1ed1i \u0111a) \u00d7 100<\/strong>. V\u00ed d\u1ee5: \u0111\u1ea1t 72\/90 \u0111i\u1ec3m = (72 \u00f7 90) \u00d7 100 = <strong>80%<\/strong> \u2014 x\u1ebfp lo\u1ea1i Gi\u1ecfi.<\/p>\n<\/div>\n<div style=\"background: #f8f9fa; border-left: 4px solid #4f46e5; padding: 16px 20px; margin: 15px 0; border-radius: 0 8px 8px 0;\">\n<h3 style=\"margin-top: 0; color: #4f46e5;\">\u2753 M\u00e1y t\u00ednh Casio t\u00ednh ph\u1ea7n tr\u0103m b\u1eb1ng c\u00e1ch n\u00e0o?<\/h3>\n<p style=\"margin-bottom: 0;\">Nh\u1eadp s\u1ed1 \u2192 nh\u1ea5n \u00d7 \u2192 nh\u1eadp s\u1ed1 ph\u1ea7n tr\u0103m \u2192 nh\u1ea5n ph\u00edm <strong>%<\/strong>. V\u00ed d\u1ee5: b\u1ea5m 500 \u00d7 20 \u2192 nh\u1ea5n % \u2192 ra ngay k\u1ebft qu\u1ea3 <strong>100<\/strong>. \u0110\u1ed1i v\u1edbi t\u00ednh gi\u00e1 gi\u1ea3m: nh\u1eadp 500 \u2192 nh\u1ea5n \u2212 \u2192 nh\u1eadp 20 \u2192 nh\u1ea5n % \u2192 k\u1ebft qu\u1ea3 <strong>400<\/strong>.<\/p>\n<\/div>\n<h2>C\u00e1c B\u00e0i Vi\u1ebft Li\u00ean Quan<\/h2>\n<p>\u0110\u1ec3 n\u1eafm v\u1eefng ho\u00e0n to\u00e0n m\u1ecdi kh\u00eda c\u1ea1nh c\u1ee7a t\u00ednh ph\u1ea7n tr\u0103m, h\u00e3y tham kh\u1ea3o c\u00e1c b\u00e0i vi\u1ebft chuy\u00ean s\u00e2u trong chu\u1ed7i h\u01b0\u1edbng d\u1eabn c\u1ee7a ch\u00fang t\u00f4i:<\/p>\n<div style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; margin: 20px 0;\">\n  <a href=\"https:\/\/1phantram.com\/blog\/cong-thuc-tinh-phan-tram\/\" style=\"display: block; padding: 16px; background: #f0f4ff; border-radius: 8px; text-decoration: none; border: 1px solid #c7d2fe;\"><br \/>\n    <span style=\"font-size: 1.4em;\">\ud83d\udcd0<\/span><br \/>\n    <strong style=\"display: block; color: #1e293b; margin: 6px 0 4px;\">T\u1ed5ng H\u1ee3p C\u00f4ng Th\u1ee9c T\u00ednh Ph\u1ea7n Tr\u0103m<\/strong><br \/>\n    <span style=\"color: #64748b; font-size: 0.9em;\">T\u1ea5t c\u1ea3 c\u00f4ng th\u1ee9c t\u1eeb c\u01a1 b\u1ea3n \u0111\u1ebfn n\u00e2ng cao v\u1edbi v\u00ed d\u1ee5 minh h\u1ecda<\/span><br \/>\n  <\/a><br \/>\n  <a href=\"https:\/\/1phantram.com\/blog\/cach-tinh-phan-tram-tang-giam\/\" style=\"display: block; padding: 16px; background: #f0f4ff; border-radius: 8px; text-decoration: none; border: 1px solid #c7d2fe;\"><br \/>\n    <span style=\"font-size: 1.4em;\">\ud83d\udcc8<\/span><br \/>\n    <strong style=\"display: block; color: #1e293b; margin: 6px 0 4px;\">C\u00e1ch T\u00ednh Ph\u1ea7n Tr\u0103m T\u0103ng Gi\u1ea3m<\/strong><br \/>\n    <span style=\"color: #64748b; font-size: 0.9em;\">H\u01b0\u1edbng d\u1eabn chi ti\u1ebft t\u00ednh % thay \u0111\u1ed5i theo chi\u1ec1u t\u0103ng v\u00e0 gi\u1ea3m<\/span><br \/>\n  <\/a><br \/>\n  <a href=\"https:\/\/1phantram.com\/blog\/tinh-phan-tram-giam-gia\/\" style=\"display: block; padding: 16px; background: #f0f4ff; border-radius: 8px; text-decoration: none; border: 1px solid #c7d2fe;\"><br \/>\n    <span style=\"font-size: 1.4em;\">\ud83d\uded2<\/span><br \/>\n    <strong style=\"display: block; color: #1e293b; margin: 6px 0 4px;\">T\u00ednh Ph\u1ea7n Tr\u0103m Gi\u1ea3m Gi\u00e1<\/strong><br \/>\n    <span style=\"color: #64748b; font-size: 0.9em;\">Mua s\u1eafm th\u00f4ng minh v\u1edbi k\u1ef9 n\u0103ng t\u00ednh gi\u1ea3m gi\u00e1 ch\u00ednh x\u00e1c<\/span><br \/>\n  <\/a><br \/>\n  <a href=\"https:\/\/1phantram.com\/blog\/tinh-lai-suat-ngan-hang\/\" style=\"display: block; padding: 16px; background: #f0f4ff; border-radius: 8px; text-decoration: none; border: 1px solid #c7d2fe;\"><br \/>\n    <span style=\"font-size: 1.4em;\">\ud83c\udfe6<\/span><br \/>\n    <strong style=\"display: block; color: #1e293b; margin: 6px 0 4px;\">T\u00ednh L\u00e3i Su\u1ea5t Ng\u00e2n H\u00e0ng<\/strong><br \/>\n    <span style=\"color: #64748b; font-size: 0.9em;\">L\u00e3i \u0111\u01a1n, l\u00e3i k\u00e9p, g\u1eedi ti\u1ebft ki\u1ec7m \u2014 t\u00ednh \u0111\u00fang \u0111\u1ec3 kh\u00f4ng b\u1ecb thi\u1ec7t<\/span><br \/>\n  <\/a><br \/>\n  <a href=\"https:\/\/1phantram.com\/blog\/tinh-phan-tram-diem-thi\/\" style=\"display: block; padding: 16px; background: #f0f4ff; border-radius: 8px; text-decoration: none; border: 1px solid #c7d2fe;\"><br \/>\n    <span style=\"font-size: 1.4em;\">\ud83d\udcdd<\/span><br \/>\n    <strong style=\"display: block; color: #1e293b; margin: 6px 0 4px;\">T\u00ednh Ph\u1ea7n Tr\u0103m \u0110i\u1ec3m Thi<\/strong><br \/>\n    <span style=\"color: #64748b; font-size: 0.9em;\">Quy \u0111\u1ed5i \u0111i\u1ec3m s\u1ed1 sang %, x\u1ebfp lo\u1ea1i h\u1ecdc l\u1ef1c ch\u00ednh x\u00e1c<\/span><br \/>\n  <\/a><br \/>\n  <a href=\"https:\/\/1phantram.com\/blog\/tinh-phan-tram-tren-may-tinh\/\" style=\"display: block; padding: 16px; background: #f0f4ff; border-radius: 8px; text-decoration: none; border: 1px solid #c7d2fe;\"><br \/>\n    <span style=\"font-size: 1.4em;\">\ud83d\udda9<\/span><br \/>\n    <strong style=\"display: block; color: #1e293b; margin: 6px 0 4px;\">T\u00ednh % Tr\u00ean M\u00e1y T\u00ednh B\u1ecf T\u00fai<\/strong><br \/>\n    <span style=\"color: #64748b; font-size: 0.9em;\">H\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng ph\u00edm % tr\u00ean Casio, Sharp v\u00e0 c\u00e1c h\u00e3ng kh\u00e1c<\/span><br \/>\n  <\/a><br \/>\n  <a href=\"https:\/\/1phantram.com\/blog\/bai-tap-tinh-phan-tram-co-loi-giai\/\" style=\"display: block; padding: 16px; background: #f0f4ff; border-radius: 8px; text-decoration: none; border: 1px solid #c7d2fe;\"><br \/>\n    <span style=\"font-size: 1.4em;\">\ud83d\udcda<\/span><br \/>\n    <strong style=\"display: block; color: #1e293b; margin: 6px 0 4px;\">B\u00e0i T\u1eadp T\u00ednh Ph\u1ea7n Tr\u0103m C\u00f3 L\u1eddi Gi\u1ea3i<\/strong><br \/>\n    <span style=\"color: #64748b; font-size: 0.9em;\">50+ b\u00e0i t\u1eadp th\u1ef1c h\u00e0nh t\u1eeb d\u1ec5 \u0111\u1ebfn kh\u00f3 v\u1edbi \u0111\u00e1p \u00e1n chi ti\u1ebft<\/span><br \/>\n  <\/a><br \/>\n  <a href=\"https:\/\/1phantram.com\/blog\/lai-kep-la-gi\/\" style=\"display: block; padding: 16px; background: #f0f4ff; border-radius: 8px; text-decoration: none; border: 1px solid #c7d2fe;\"><br \/>\n    <span style=\"font-size: 1.4em;\">\ud83d\udcb0<\/span><br \/>\n    <strong style=\"display: block; color: #1e293b; margin: 6px 0 4px;\">L\u00e3i K\u00e9p L\u00e0 G\u00ec?<\/strong><br \/>\n    <span style=\"color: #64748b; font-size: 0.9em;\">Hi\u1ec3u l\u00e3i k\u00e9p \u0111\u1ec3 t\u0103ng hi\u1ec7u qu\u1ea3 \u0111\u1ea7u t\u01b0 v\u00e0 ti\u1ebft ki\u1ec7m d\u00e0i h\u1ea1n<\/span><br \/>\n  <\/a>\n<\/div>\n<div style=\"background: linear-gradient(135deg, #10b981 0%, #059669 100%); border-radius: 12px; padding: 28px; margin: 40px 0; text-align: center; color: white;\">\n<h3 style=\"margin: 0 0 10px 0; color: white; font-size: 1.4em;\">\ud83d\ude80 S\u1eb5n s\u00e0ng t\u00ednh ph\u1ea7n tr\u0103m ngay?<\/h3>\n<p style=\"margin: 0 0 20px 0; font-size: 1.05em; opacity: 0.95;\">\u00c1p d\u1ee5ng ngay nh\u1eefng g\u00ec b\u1ea1n v\u1eeba h\u1ecdc v\u1edbi <strong>m\u00e1y t\u00ednh ph\u1ea7n tr\u0103m tr\u1ef1c tuy\u1ebfn mi\u1ec5n ph\u00ed<\/strong> \u2014 nhanh, ch\u00ednh x\u00e1c, kh\u00f4ng qu\u1ea3ng c\u00e1o.<\/p>\n<p>  <a href=\"https:\/\/1phantram.com\" style=\"background: white; color: #059669; padding: 14px 32px; border-radius: 8px; text-decoration: none; font-weight: bold; font-size: 1.1em; display: inline-block;\">\ud83d\udd22 T\u00ednh Ph\u1ea7n Tr\u0103m Nhanh T\u1ea1i 1phantram.com<\/a>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">\ud83d\udcd6 Xem th\u00eam: <a href=\"https:\/\/1phantram.com\/blog\/huong-dan-tinh-phan-tram-nhanh-va-chinh-xac\/\">H\u01b0\u1edbng d\u1eabn t\u00ednh ph\u1ea7n tr\u0103m nhanh v\u00e0 ch\u00ednh x\u00e1c<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>H\u01b0\u1edbng d\u1eabn t\u00ednh ph\u1ea7n tr\u0103m to\u00e0n di\u1ec7n t\u1eeb A-Z: c\u00f4ng th\u1ee9c c\u01a1 b\u1ea3n, 6 d\u1ea1ng ph\u1ed5 bi\u1ebfn, c\u00e1ch t\u00ednh tr\u00ean Casio\/Excel\/\u0111i\u1ec7n tho\u1ea1i v\u00e0 c\u00e1c l\u1ed7i&#8230;<\/p>\n","protected":false},"author":1,"featured_media":1001,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"rank_math_title":"","rank_math_description":"","rank_math_focus_keyword":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-10","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-huong-dan"],"_links":{"self":[{"href":"https:\/\/1phantram.com\/blog\/wp-json\/wp\/v2\/posts\/10","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/1phantram.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/1phantram.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/1phantram.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/1phantram.com\/blog\/wp-json\/wp\/v2\/comments?post=10"}],"version-history":[{"count":1,"href":"https:\/\/1phantram.com\/blog\/wp-json\/wp\/v2\/posts\/10\/revisions"}],"predecessor-version":[{"id":87,"href":"https:\/\/1phantram.com\/blog\/wp-json\/wp\/v2\/posts\/10\/revisions\/87"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/1phantram.com\/blog\/wp-json\/wp\/v2\/media\/1001"}],"wp:attachment":[{"href":"https:\/\/1phantram.com\/blog\/wp-json\/wp\/v2\/media?parent=10"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/1phantram.com\/blog\/wp-json\/wp\/v2\/categories?post=10"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/1phantram.com\/blog\/wp-json\/wp\/v2\/tags?post=10"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}