{"id":1449,"date":"2026-07-26T21:51:43","date_gmt":"2026-07-26T21:51:43","guid":{"rendered":"https:\/\/1phantram.com\/blog\/mua-1-tang-1-bao-nhieu-phan-tram\/"},"modified":"2026-08-01T00:14:57","modified_gmt":"2026-08-01T00:14:57","slug":"mua-1-tang-1-bao-nhieu-phan-tram","status":"publish","type":"post","link":"https:\/\/1phantram.com\/blog\/mua-1-tang-1-bao-nhieu-phan-tram\/","title":{"rendered":"Mua 1 T\u1eb7ng 1: Th\u1ef1c S\u1ef1 B\u1ea1n \u0110ang Gi\u1ea3m Bao Nhi\u00eau Ph\u1ea7n Tr\u0103m?"},"content":{"rendered":"<style>\n.pt42-wrap{max-width:860px;margin:0 auto;padding:0 4px;font-family:-apple-system,BlinkMacSystemFont,\"Segoe UI\",Roboto,Helvetica,Arial,sans-serif;line-height:1.75;color:#1f2937;font-size:17px}\n.pt42-wrap p{margin:0 0 16px}\n.pt42-wrap h2{font-size:26px;line-height:1.3;margin:38px 0 14px;color:#0f172a;font-weight:700;border-left:5px solid #ea580c;padding-left:12px}\n.pt42-wrap h3{font-size:20px;margin:26px 0 10px;color:#0f172a;font-weight:700}\n.pt42-wrap ul,.pt42-wrap ol{margin:0 0 18px;padding-left:24px}\n.pt42-wrap li{margin:0 0 8px}\n.pt42-wrap a{color:#c2410c;text-decoration:underline;font-weight:600}\n.pt42-wrap a:hover{color:#9a3412}\n.pt42-tablewrap{overflow-x:auto;margin:20px 0 26px}\n.pt42-wrap table{width:100%;border-collapse:collapse;font-size:15.5px;min-width:480px}\n.pt42-wrap th,.pt42-wrap td{border:1px solid #e5e7eb;padding:10px 12px;text-align:left;vertical-align:top}\n.pt42-wrap th{background:#fff7ed;color:#7c2d12;font-weight:700}\n.pt42-wrap tbody tr:nth-child(even){background:#fafafa}\n.pt42-highlight{background:#fef9c3;padding:1px 5px;border-radius:4px;font-weight:700}\n.pt42-faq{margin:18px 0 10px}\n.pt42-faq details{border:1px solid #e5e7eb;border-radius:10px;padding:4px 18px;margin-bottom:12px;background:#fff}\n.pt42-faq summary{cursor:pointer;font-weight:700;font-size:17px;color:#0f172a;padding:12px 0;list-style:none}\n.pt42-faq summary::-webkit-details-marker{display:none}\n.pt42-faq summary::before{content:\"\u2795\";margin-right:10px;font-size:13px}\n.pt42-faq details[open] summary::before{content:\"\u2796\"}\n.pt42-faq details p{padding:0 0 14px;margin:0;color:#374151;font-size:16px}\n.pt42-toc{background:#f8fafc;border:1px solid #e2e8f0;border-radius:12px;padding:18px 22px;margin:24px 0}\n.pt42-toc strong{display:block;margin-bottom:10px;color:#0f172a;font-size:16px}\n.pt42-toc ol{margin:0;padding-left:22px}\n.pt42-toc a{font-weight:500}\n<\/style>\n<div class=\"pt42-wrap\">\n<p>B\u1ea1n \u0111\u1ee9ng tr\u01b0\u1edbc qu\u1ea7y h\u00e0ng, t\u1ea5m bi\u1ec3n to \u0111\u00f9ng ghi <strong>&#8220;MUA 1 T\u1eb6NG 1&#8221;<\/strong>, v\u00e0 trong \u0111\u1ea7u b\u1eadt l\u00ean m\u1ed9t suy ngh\u0129 quen thu\u1ed9c: &#8220;Tr\u1eddi, mua m\u1ed9t \u0111\u01b0\u1ee3c hai, coi nh\u01b0 mi\u1ec5n ph\u00ed m\u1ed9t m\u00f3n, l\u1eddi qu\u00e1!&#8221;. Nh\u01b0ng n\u1ebfu ai \u0111\u00f3 h\u1ecfi th\u1eb3ng: <em>ch\u01b0\u01a1ng tr\u00ecnh n\u00e0y th\u1ef1c s\u1ef1 gi\u1ea3m cho b\u1ea1n bao nhi\u00eau ph\u1ea7n tr\u0103m?<\/em> \u2014 r\u1ea5t nhi\u1ec1u ng\u01b0\u1eddi s\u1ebd ng\u1eadp ng\u1eebng. C\u00f3 ng\u01b0\u1eddi n\u00f3i 100%, c\u00f3 ng\u01b0\u1eddi n\u00f3i 50%, c\u00f3 ng\u01b0\u1eddi ch\u1ec9 c\u01b0\u1eddi tr\u1eeb. S\u1ef1 th\u1eadt l\u00e0 con s\u1ed1 n\u00e0y kh\u00f4ng h\u1ec1 m\u01a1 h\u1ed3 ch\u00fat n\u00e0o; n\u00f3 c\u00f3 c\u00f4ng th\u1ee9c r\u00f5 r\u00e0ng, v\u00e0 khi b\u1ea1n hi\u1ec3u c\u00f4ng th\u1ee9c \u0111\u00f3, b\u1ea1n s\u1ebd kh\u00f4ng bao gi\u1edd b\u1ecb c\u00e1c t\u1ea5m bi\u1ec3n khuy\u1ebfn m\u00e3i &#8220;d\u1eaft m\u0169i&#8221; n\u1eefa.<\/p>\n<p>B\u00e0i vi\u1ebft n\u00e0y s\u1ebd m\u1ed5 x\u1ebb t\u1eadn g\u1ed1c con s\u1ed1 ph\u1ea7n tr\u0103m \u1ea9n sau m\u1ecdi ki\u1ec3u &#8220;mua M t\u1eb7ng N&#8221;, t\u1eeb mua 1 t\u1eb7ng 1 kinh \u0111i\u1ec3n cho t\u1edbi mua 3 t\u1eb7ng 1, mua 1 t\u1eb7ng 2, k\u00e8m b\u1ea3ng tra nhanh, v\u00ed d\u1ee5 s\u1ed1 c\u1ee5 th\u1ec3 b\u1eb1ng ti\u1ec1n Vi\u1ec7t, c\u00e1c b\u1eaby t\u00e2m l\u00fd m\u00e0 nh\u00e0 b\u00e1n l\u1ebb hay d\u00f9ng, v\u00e0 m\u1eb9o t\u00ednh nh\u1ea9m trong 3 gi\u00e2y ngay t\u1ea1i qu\u1ea7y.<\/p>\n<p>&#8220;Mua 1 t\u1eb7ng 1&#8221; th\u1ef1c ch\u1ea5t l\u00e0 <strong>gi\u1ea3m 50%<\/strong> ch\u1ee9 kh\u00f4ng ph\u1ea3i 100%: b\u1ea1n mua 2 m\u00f3n nh\u01b0ng ch\u1ec9 tr\u1ea3 ti\u1ec1n cho 1 m\u00f3n, n\u00ean gi\u00e1 \u0111\u01a1n v\u1ecb trung b\u00ecnh gi\u1ea3m \u0111\u00fang m\u1ed9t n\u1eeda. C\u00f4ng th\u1ee9c chung cho m\u1ecdi khuy\u1ebfn m\u00e3i ki\u1ec3u n\u00e0y l\u00e0 <span class=\"pt42-highlight\">% gi\u1ea3m th\u1ef1c = N \/ (M + N) \u00d7 100%<\/span> \u2014 v\u1edbi M l\u00e0 s\u1ed1 m\u00f3n ph\u1ea3i mua, N l\u00e0 s\u1ed1 m\u00f3n \u0111\u01b0\u1ee3c t\u1eb7ng. V\u00ed d\u1ee5 mua 1 t\u1eb7ng 1 \u2192 1\/(1+1) = 50%; mua 2 t\u1eb7ng 1 \u2192 1\/3 \u2248 33,3%. Ki\u1ec3u \u01b0u \u0111\u00e3i n\u00e0y ch\u1ec9 th\u1ef1c s\u1ef1 l\u1ee3i khi b\u1ea1n c\u1ea7n \u0111\u1ee7 s\u1ed1 l\u01b0\u1ee3ng v\u00e0 gi\u00e1 g\u1ed1c kh\u00f4ng b\u1ecb \u0111\u1ed9i l\u00ean tr\u01b0\u1edbc \u0111\u00f3. Mu\u1ed1n ra con s\u1ed1 ch\u00ednh x\u00e1c cho t\u1eebng \u0111\u01a1n, h\u00e3y d\u00f9ng <a href=\"https:\/\/1phantram.com\/\">c\u00f4ng c\u1ee5 t\u00ednh ph\u1ea7n tr\u0103m gi\u1ea3m gi\u00e1 tr\u00ean 1phantram.com<\/a>.<\/p>\n<\/div>\n<div class=\"pt42-toc\">\n<strong>N\u1ed9i dung ch\u00ednh trong b\u00e0i<\/strong><\/p>\n<ol>\n<li><a href=\"#pt42-s1\">&#8220;Mua 1 t\u1eb7ng 1&#8221; gi\u1ea3m bao nhi\u00eau ph\u1ea7n tr\u0103m?<\/a><\/li>\n<li><a href=\"#pt42-s2\">C\u00f4ng th\u1ee9c chung cho m\u1ecdi &#8220;mua M t\u1eb7ng N&#8221;<\/a><\/li>\n<li><a href=\"#pt42-s3\">B\u1ea3ng tra nhanh % gi\u1ea3m theo t\u1eebng bi\u1ebfn th\u1ec3<\/a><\/li>\n<li><a href=\"#pt42-s4\">&#8220;Mua 1 t\u1eb7ng 1&#8221; v\u00e0 &#8220;gi\u1ea3m 50%&#8221; c\u00f3 gi\u1ed1ng nhau kh\u00f4ng?<\/a><\/li>\n<li><a href=\"#pt42-s5\">V\u00ed d\u1ee5 s\u1ed1 c\u1ee5 th\u1ec3 b\u1eb1ng ti\u1ec1n Vi\u1ec7t<\/a><\/li>\n<li><a href=\"#pt42-s6\">Nh\u1eefng b\u1eaby t\u00e2m l\u00fd \u1ea9n sau khuy\u1ebfn m\u00e3i<\/a><\/li>\n<li><a href=\"#pt42-s7\">C\u00e1ch ki\u1ec3m tra gi\u00e1 \u0111\u01a1n v\u1ecb th\u1eadt trong 3 gi\u00e2y<\/a><\/li>\n<li><a href=\"#pt42-s8\">M\u1eb9o cho ng\u01b0\u1eddi mua v\u00e0 ng\u01b0\u1eddi b\u00e1n<\/a><\/li>\n<\/ol>\n<\/div>\n<h2 id=\"pt42-s1\">1. &#8220;Mua 1 t\u1eb7ng 1&#8221; gi\u1ea3m bao nhi\u00eau ph\u1ea7n tr\u0103m?<\/h2>\n<p>H\u00e3y b\u1eaft \u0111\u1ea7u b\u1eb1ng c\u00e1ch g\u1ee1 b\u1ecf hi\u1ec3u l\u1ea7m ph\u1ed5 bi\u1ebfn nh\u1ea5t. R\u1ea5t nhi\u1ec1u ng\u01b0\u1eddi tin r\u1eb1ng &#8220;\u0111\u01b0\u1ee3c t\u1eb7ng m\u1ed9t m\u00f3n&#8221; ngh\u0129a l\u00e0 &#8220;gi\u1ea3m 100%&#8221;. \u0110i\u1ec1u n\u00e0y ch\u1ec9 \u0111\u00fang n\u1ebfu b\u1ea1n t\u00ednh ri\u00eang cho <em>m\u00f3n \u0111\u01b0\u1ee3c t\u1eb7ng<\/em> \u2014 \u0111\u00fang l\u00e0 m\u00f3n th\u1ee9 hai b\u1ea1n kh\u00f4ng tr\u1ea3 \u0111\u1ed3ng n\u00e0o, t\u1ee9c m\u00f3n \u0111\u00f3 gi\u1ea3m 100%. Nh\u01b0ng khuy\u1ebfn m\u00e3i kh\u00f4ng \u00e1p d\u1ee5ng l\u00ean m\u1ed9t m\u00f3n; n\u00f3 \u00e1p d\u1ee5ng l\u00ean <strong>c\u1ea3 giao d\u1ecbch<\/strong> g\u1ed3m hai m\u00f3n.<\/p>\n<p>Khi b\u1ea1n nh\u00ecn v\u00e0o to\u00e0n b\u1ed9 \u0111\u01a1n h\u00e0ng, ph\u00e9p t\u00ednh \u0111\u01a1n gi\u1ea3n nh\u01b0 sau: b\u1ea1n nh\u1eadn v\u1ec1 2 m\u00f3n, nh\u01b0ng ch\u1ec9 b\u1ecf ti\u1ec1n cho 1 m\u00f3n. T\u1ed5ng s\u1ed1 ti\u1ec1n b\u1ea1n tr\u1ea3 b\u1eb1ng \u0111\u00fang m\u1ed9t n\u1eeda so v\u1edbi vi\u1ec7c mua 2 m\u00f3n theo gi\u00e1 ni\u00eam y\u1ebft. M\u1ed9t n\u1eeda c\u1ee7a gi\u00e1 g\u1ed1c ch\u00ednh l\u00e0 <strong>gi\u1ea3m 50%<\/strong>. \u0110\u00e2y l\u00e0 c\u00e2u tr\u1ea3 l\u1eddi chu\u1ea9n x\u00e1c v\u1ec1 m\u1eb7t to\u00e1n h\u1ecdc, v\u00e0 n\u00f3 kh\u00f4ng thay \u0111\u1ed5i d\u00f9 m\u00f3n h\u00e0ng l\u00e0 ly c\u00e0 ph\u00ea, h\u1ed9p s\u1eefa hay \u0111\u00f4i gi\u00e0y.<\/p>\n<p>\u0110\u1ec3 d\u1ec5 h\u00ecnh dung, h\u00e3y ngh\u0129 theo &#8220;gi\u00e1 trung b\u00ecnh m\u1ed7i m\u00f3n&#8221;. N\u1ebfu m\u1ed9t m\u00f3n gi\u00e1 100.000\u0111, mua 1 t\u1eb7ng 1 ngh\u0129a l\u00e0 b\u1ea1n tr\u1ea3 100.000\u0111 cho 2 m\u00f3n, t\u1ee9c m\u1ed7i m\u00f3n ch\u1ec9 c\u00f2n 50.000\u0111. T\u1eeb 100.000\u0111 xu\u1ed1ng 50.000\u0111 l\u00e0 gi\u1ea3m 50%. Con s\u1ed1 50% n\u00e0y l\u00e0 <strong>tr\u1ea7n l\u1ee3i \u00edch t\u1ed1i \u0111a<\/strong> c\u1ee7a ch\u01b0\u01a1ng tr\u00ecnh \u2014 b\u1ea1n kh\u00f4ng th\u1ec3 l\u1ee3i h\u01a1n 50% v\u1edbi m\u1ed9t ch\u01b0\u01a1ng tr\u00ecnh mua 1 t\u1eb7ng 1 thu\u1ea7n t\u00fay, d\u00f9 c\u1ea3m gi\u00e1c &#8220;\u0111\u01b0\u1ee3c cho kh\u00f4ng&#8221; khi\u1ebfn n\u00f3 c\u00f3 v\u1ebb h\u1eddi h\u01a1n th\u1ebf.<\/p>\n<p>\n<strong>Ghi nh\u1edb nhanh:<\/strong> &#8220;T\u1eb7ng th\u00eam 1 m\u00f3n&#8221; \u2260 &#8220;gi\u1ea3m 100%&#8221;. T\u00ednh tr\u00ean to\u00e0n \u0111\u01a1n h\u00e0ng, mua 1 t\u1eb7ng 1 lu\u00f4n t\u01b0\u01a1ng \u0111\u01b0\u01a1ng gi\u1ea3m 50% tr\u00ean gi\u00e1 \u0111\u01a1n v\u1ecb.<\/p>\n<h2 id=\"pt42-s2\">2. C\u00f4ng th\u1ee9c chung cho m\u1ecdi &#8220;mua M t\u1eb7ng N&#8221;<\/h2>\n<\/p>\n<p>\u0110i\u1ec1u tuy\u1ec7t v\u1eddi l\u00e0 b\u1ea1n kh\u00f4ng c\u1ea7n h\u1ecdc thu\u1ed9c t\u1eebng tr\u01b0\u1eddng h\u1ee3p. Ch\u1ec9 c\u1ea7n m\u1ed9t c\u00f4ng th\u1ee9c duy nh\u1ea5t \u00e1p d\u1ee5ng cho m\u1ecdi ki\u1ec3u \u01b0u \u0111\u00e3i &#8220;mua M t\u1eb7ng N&#8221;:<\/p>\n<p style=\"text-align:center;font-size:20px;background:#fff7ed;border:1px dashed #fb923c;border-radius:10px;padding:16px;color:#7c2d12\"><strong>% gi\u1ea3m th\u1ef1c = N \/ (M + N) \u00d7 100%<\/strong><\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<ul>\n<li><strong>M<\/strong> = s\u1ed1 m\u00f3n b\u1ea1n ph\u1ea3i mua (ph\u1ea3i tr\u1ea3 ti\u1ec1n).<\/li>\n<li><strong>N<\/strong> = s\u1ed1 m\u00f3n \u0111\u01b0\u1ee3c t\u1eb7ng mi\u1ec5n ph\u00ed.<\/li>\n<li><strong>M + N<\/strong> = t\u1ed5ng s\u1ed1 m\u00f3n b\u1ea1n th\u1ef1c nh\u1eadn.<\/li>\n<\/ul>\n<p>\u00dd ngh\u0129a c\u1ee7a c\u00f4ng th\u1ee9c r\u1ea5t tr\u1ef1c quan: trong t\u1ed5ng s\u1ed1 m\u00f3n b\u1ea1n c\u1ea7m v\u1ec1, bao nhi\u00eau ph\u1ea7n \u0111\u01b0\u1ee3c cho kh\u00f4ng? T\u1ef7 l\u1ec7 &#8220;m\u00f3n mi\u1ec5n ph\u00ed tr\u00ean t\u1ed5ng m\u00f3n&#8221; ch\u00ednh l\u00e0 ph\u1ea7n tr\u0103m b\u1ea1n ti\u1ebft ki\u1ec7m \u0111\u01b0\u1ee3c. V\u1edbi mua 1 t\u1eb7ng 1: N = 1, M + N = 2, n\u00ean 1\/2 = 50%. V\u1edbi mua 2 t\u1eb7ng 1: N = 1, M + N = 3, n\u00ean 1\/3 \u2248 33,3%.<\/p>\n<p>M\u1ed9t c\u00e1ch di\u1ec5n gi\u1ea3i kh\u00e1c c\u0169ng cho ra c\u00f9ng k\u1ebft qu\u1ea3: b\u1ea1n <strong>tr\u1ea3 ti\u1ec1n cho M m\u00f3n \u0111\u1ec3 nh\u1eadn M + N m\u00f3n<\/strong>. Gi\u00e1 trung b\u00ecnh m\u1ed7i m\u00f3n = (gi\u00e1 g\u1ed1c \u00d7 M) \/ (M + N). So v\u1edbi gi\u00e1 g\u1ed1c, ph\u1ea7n gi\u1ea3m ch\u00ednh l\u00e0 N\/(M+N). D\u00f9 b\u1ea1n ti\u1ebfp c\u1eadn theo h\u01b0\u1edbng &#8220;ph\u1ea7n \u0111\u01b0\u1ee3c t\u1eb7ng&#8221; hay &#8220;ph\u1ea7n ph\u1ea3i tr\u1ea3&#8221;, con s\u1ed1 cu\u1ed1i c\u00f9ng lu\u00f4n kh\u1edbp nhau.<\/p>\n<h3>V\u00ec sao c\u00e0ng &#8220;t\u1eb7ng nhi\u1ec1u m\u00f3n c\u00f9ng l\u00fac&#8221; th\u00ec % gi\u1ea3m m\u1ed7i l\u1ea7n l\u1ea1i th\u1ea5p h\u01a1n?<\/h3>\n<p>Nhi\u1ec1u ng\u01b0\u1eddi th\u1ea5y &#8220;mua 2 t\u1eb7ng 1&#8221; nghe ho\u00e0nh tr\u00e1ng h\u01a1n &#8220;mua 1 t\u1eb7ng 1&#8221; v\u00ec ph\u1ea3i mua nhi\u1ec1u h\u01a1n, c\u1ee9 t\u01b0\u1edfng l\u1ee3i h\u01a1n. Th\u1ef1c t\u1ebf ng\u01b0\u1ee3c l\u1ea1i: mua 1 t\u1eb7ng 1 (50%) l\u1ee3i h\u01a1n mua 2 t\u1eb7ng 1 (33,3%) v\u1ec1 m\u1eb7t t\u1ef7 l\u1ec7. L\u00fd do l\u00e0 \u1edf &#8220;mua 2 t\u1eb7ng 1&#8221;, m\u00f3n mi\u1ec5n ph\u00ed b\u1ecb chia \u0111\u1ec1u cho 3 m\u00f3n thay v\u00ec 2 m\u00f3n, n\u00ean ph\u1ea7n l\u1ee3i tr\u00ean m\u1ed7i m\u00f3n lo\u00e3ng \u0111i. C\u00e0ng b\u1eaft b\u1ea1n mua nhi\u1ec1u \u0111\u1ec3 nh\u1eadn c\u00f9ng s\u1ed1 l\u01b0\u1ee3ng qu\u00e0, t\u1ef7 l\u1ec7 gi\u1ea3m c\u00e0ng nh\u1ecf.<\/p>\n<h2 id=\"pt42-s3\">3. B\u1ea3ng tra nhanh % gi\u1ea3m theo t\u1eebng bi\u1ebfn th\u1ec3<\/h2>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u1ea3ng tra c\u1ee9u b\u1ea1n c\u00f3 th\u1ec3 ch\u1ee5p m\u00e0n h\u00ecnh \u0111\u1ec3 d\u00f9ng khi \u0111i mua s\u1eafm. T\u1ea5t c\u1ea3 \u0111\u1ec1u t\u00ednh theo c\u00f4ng th\u1ee9c N\/(M+N):<\/p>\n<div class=\"pt42-tablewrap\">\n<table>\n<thead>\n<tr>\n<th>Ch\u01b0\u01a1ng tr\u00ecnh<\/th>\n<th>M (mua)<\/th>\n<th>N (t\u1eb7ng)<\/th>\n<th>Ph\u00e9p t\u00ednh<\/th>\n<th>% gi\u1ea3m th\u1ef1c<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Mua 1 t\u1eb7ng 1<\/td>\n<td>1<\/td>\n<td>1<\/td>\n<td>1\/(1+1)<\/td>\n<td><strong>50%<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Mua 2 t\u1eb7ng 1<\/td>\n<td>2<\/td>\n<td>1<\/td>\n<td>1\/(2+1)<\/td>\n<td><strong>\u2248 33,3%<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Mua 3 t\u1eb7ng 1<\/td>\n<td>3<\/td>\n<td>1<\/td>\n<td>1\/(3+1)<\/td>\n<td><strong>25%<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Mua 4 t\u1eb7ng 1<\/td>\n<td>4<\/td>\n<td>1<\/td>\n<td>1\/(4+1)<\/td>\n<td><strong>20%<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Mua 5 t\u1eb7ng 1<\/td>\n<td>5<\/td>\n<td>1<\/td>\n<td>1\/(5+1)<\/td>\n<td><strong>\u2248 16,7%<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Mua 1 t\u1eb7ng 2<\/td>\n<td>1<\/td>\n<td>2<\/td>\n<td>2\/(1+2)<\/td>\n<td><strong>\u2248 66,7%<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Mua 2 t\u1eb7ng 2<\/td>\n<td>2<\/td>\n<td>2<\/td>\n<td>2\/(2+2)<\/td>\n<td><strong>50%<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Mua 2 t\u1eb7ng 3<\/td>\n<td>2<\/td>\n<td>3<\/td>\n<td>3\/(2+3)<\/td>\n<td><strong>60%<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Mua 3 t\u1eb7ng 2<\/td>\n<td>3<\/td>\n<td>2<\/td>\n<td>2\/(3+2)<\/td>\n<td><strong>40%<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Mua 1 t\u1eb7ng 3<\/td>\n<td>1<\/td>\n<td>3<\/td>\n<td>3\/(1+3)<\/td>\n<td><strong>75%<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>V\u00e0i quan s\u00e1t th\u00fa v\u1ecb t\u1eeb b\u1ea3ng tr\u00ean:<\/p>\n<ul>\n<li><strong>Mua 2 t\u1eb7ng 2 = mua 1 t\u1eb7ng 1 = 50%.<\/strong> V\u1ec1 m\u1eb7t t\u1ef7 l\u1ec7, hai ch\u01b0\u01a1ng tr\u00ecnh n\u00e0y gi\u1ed1ng h\u1ec7t nhau, ch\u1ec9 kh\u00e1c \u1edf s\u1ed1 l\u01b0\u1ee3ng b\u1ea1n bu\u1ed9c ph\u1ea3i \u00f4m v\u1ec1.<\/li>\n<li><strong>Mua 1 t\u1eb7ng 2 (\u224866,7%) v\u00e0 mua 1 t\u1eb7ng 3 (75%)<\/strong> l\u00e0 nh\u1eefng \u01b0u \u0111\u00e3i hi\u1ebfm g\u1eb7p v\u00e0 c\u1ef1c k\u1ef3 h\u1eddi \u2014 th\u01b0\u1eddng ch\u1ec9 xu\u1ea5t hi\u1ec7n khi c\u1eeda h\u00e0ng c\u1ea7n x\u1ea3 kho g\u1ea5p.<\/li>\n<li>Khi t\u1eb7ng c\u1ed1 \u0111\u1ecbnh 1 m\u00f3n, m\u1ed7i l\u1ea7n t\u0103ng s\u1ed1 m\u00f3n ph\u1ea3i mua th\u00ec % gi\u1ea3m t\u1ee5t kh\u00e1 nhanh: 50% \u2192 33% \u2192 25% \u2192 20% \u2192 17%.<\/li>\n<\/ul>\n<p>Kh\u00f4ng mu\u1ed1n t\u00ednh nh\u1ea9m? Nh\u1eadp s\u1ed1 m\u00f3n mua v\u00e0 s\u1ed1 m\u00f3n t\u1eb7ng, xem ngay % gi\u1ea3m th\u1eadt.<\/p>\n<p><a href=\"https:\/\/1phantram.com\/\">T\u00ednh % gi\u1ea3m gi\u00e1 mi\u1ec5n ph\u00ed t\u1ea1i 1phantram.com \u2192<\/a><\/p>\n<h2 id=\"pt42-s4\">4. &#8220;Mua 1 t\u1eb7ng 1&#8221; v\u00e0 &#8220;gi\u1ea3m 50%&#8221; c\u00f3 gi\u1ed1ng nhau kh\u00f4ng?<\/h2>\n<p>\u0110\u00e2y l\u00e0 c\u00e2u h\u1ecfi r\u1ea5t hay v\u00e0 c\u00e2u tr\u1ea3 l\u1eddi l\u00e0: <strong>gi\u1ed1ng nhau v\u1ec1 gi\u00e1 \u0111\u01a1n v\u1ecb, nh\u01b0ng kh\u00e1c nhau v\u1ec1 h\u00e0nh vi mua v\u00e0 t\u1ed3n kho<\/strong>. C\u00f9ng m\u1ed9t m\u00f3n 100.000\u0111:<\/p>\n<div class=\"pt42-tablewrap\">\n<table>\n<thead>\n<tr>\n<th>Ti\u00eau ch\u00ed<\/th>\n<th>Mua 1 t\u1eb7ng 1<\/th>\n<th>Gi\u1ea3m 50%<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Gi\u00e1 m\u1ed7i m\u00f3n cu\u1ed1i c\u00f9ng<\/td>\n<td>50.000\u0111<\/td>\n<td>50.000\u0111<\/td>\n<\/tr>\n<tr>\n<td>S\u1ed1 m\u00f3n t\u1ed1i thi\u1ec3u ph\u1ea3i l\u1ea5y<\/td>\n<td>2 m\u00f3n<\/td>\n<td>1 m\u00f3n<\/td>\n<\/tr>\n<tr>\n<td>S\u1ed1 ti\u1ec1n t\u1ed1i thi\u1ec3u ph\u1ea3i chi<\/td>\n<td>100.000\u0111 (cho 2 m\u00f3n)<\/td>\n<td>50.000\u0111 (cho 1 m\u00f3n)<\/td>\n<\/tr>\n<tr>\n<td>Ph\u00f9 h\u1ee3p khi<\/td>\n<td>B\u1ea1n c\u1ea7n \u0111\u00fang 2 m\u00f3n tr\u1edf l\u00ean<\/td>\n<td>B\u1ea1n ch\u1ec9 c\u1ea7n 1 m\u00f3n<\/td>\n<\/tr>\n<tr>\n<td>T\u00e1c \u0111\u1ed9ng t\u1ed3n kho c\u1ee7a ng\u01b0\u1eddi b\u00e1n<\/td>\n<td>\u0110\u1ea9y \u0111\u01b0\u1ee3c g\u1ea5p \u0111\u00f4i s\u1ed1 l\u01b0\u1ee3ng<\/td>\n<td>B\u00e1n \u0111\u01b0\u1ee3c 1 m\u00f3n\/l\u1ea7n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>N\u00f3i c\u00e1ch kh\u00e1c, n\u1ebfu b\u1ea1n th\u1ef1c s\u1ef1 c\u1ea7n mua 2 m\u00f3n, hai ch\u01b0\u01a1ng tr\u00ecnh n\u00e0y l\u1eddi nh\u01b0 nhau. Nh\u01b0ng n\u1ebfu b\u1ea1n ch\u1ec9 c\u1ea7n 1 m\u00f3n, &#8220;gi\u1ea3m 50%&#8221; t\u1ed1t h\u01a1n h\u1eb3n v\u00ec b\u1ea1n kh\u00f4ng ph\u1ea3i b\u1ecf ti\u1ec1n cho m\u00f3n th\u1ee9 hai m\u00e0 m\u00ecnh kh\u00f4ng c\u1ea7n. \u0110\u00e2y ch\u00ednh l\u00e0 \u0111i\u1ec3m m\u1ea5u ch\u1ed1t m\u00e0 nh\u00e0 b\u00e1n l\u1ebb khai th\u00e1c: &#8220;mua 1 t\u1eb7ng 1&#8221; bu\u1ed9c d\u00f2ng ti\u1ec1n c\u1ee7a b\u1ea1n ph\u1ea3i chi g\u1ea5p \u0111\u00f4i so v\u1edbi &#8220;gi\u1ea3m 50%&#8221;, \u0111\u1ed3ng th\u1eddi gi\u00fap h\u1ecd gi\u1ea3i ph\u00f3ng h\u00e0ng nhanh g\u1ea5p \u0111\u00f4i.<\/p>\n<p>V\u00ec th\u1ebf, c\u00e2u h\u1ecfi b\u1ea1n n\u00ean t\u1ef1 h\u1ecfi kh\u00f4ng ph\u1ea3i &#8220;mua 1 t\u1eb7ng 1 gi\u1ea3m bao nhi\u00eau?&#8221; m\u00e0 l\u00e0 <strong>&#8220;m\u00ecnh c\u00f3 th\u1ef1c s\u1ef1 c\u1ea7n m\u00f3n th\u1ee9 hai kh\u00f4ng?&#8221;<\/strong>. N\u1ebfu c\u00f3, ch\u01b0\u01a1ng tr\u00ecnh n\u00e0y tuy\u1ec7t v\u1eddi. N\u1ebfu kh\u00f4ng, m\u00f3n &#8220;mi\u1ec5n ph\u00ed&#8221; \u0111\u00f3 th\u1ef1c ch\u1ea5t l\u00e0 chi ph\u00ed ph\u00e1t sinh n\u1eb1m im trong t\u1ee7.<\/p>\n<h2 id=\"pt42-s5\">5. V\u00ed d\u1ee5 s\u1ed1 c\u1ee5 th\u1ec3 b\u1eb1ng ti\u1ec1n Vi\u1ec7t<\/h2>\n<p>L\u00fd thuy\u1ebft \u0111\u00e3 \u0111\u1ee7, gi\u1edd h\u00e3y \u00e1p v\u00e0o nh\u1eefng t\u00ecnh hu\u1ed1ng mua s\u1eafm quen thu\u1ed9c.<\/p>\n<h3>V\u00ed d\u1ee5 1 \u2014 Ly c\u00e0 ph\u00ea mua 1 t\u1eb7ng 1<\/h3>\n<p>M\u1ed9t ly c\u00e0 ph\u00ea ni\u00eam y\u1ebft 55.000\u0111, ch\u01b0\u01a1ng tr\u00ecnh mua 1 t\u1eb7ng 1. B\u1ea1n tr\u1ea3 55.000\u0111 v\u00e0 nh\u1eadn 2 ly. Gi\u00e1 m\u1ed7i ly = 55.000 \/ 2 = <strong>27.500\u0111<\/strong>. So v\u1edbi 55.000\u0111 ban \u0111\u1ea7u, b\u1ea1n ti\u1ebft ki\u1ec7m 27.500\u0111 m\u1ed7i ly, \u0111\u00fang <span class=\"pt42-highlight\">gi\u1ea3m 50%<\/span>. Nh\u01b0ng l\u01b0u \u00fd: b\u1ea1n ch\u1ec9 th\u1ef1c s\u1ef1 l\u1eddi n\u1ebfu u\u1ed1ng h\u1ebft c\u1ea3 2 ly, ho\u1eb7c c\u00f3 b\u1ea1n \u0111i c\u00f9ng \u0111\u1ec3 chia. Mua v\u1ec1 r\u1ed3i ly th\u1ee9 hai ngu\u1ed9i ng\u1eaft b\u1ecf \u0111i th\u00ec b\u1ea1n kh\u00f4ng gi\u1ea3m \u0111\u01b0\u1ee3c \u0111\u1ed3ng n\u00e0o \u2014 th\u1ef1c t\u1ebf b\u1ea1n tr\u1ea3 55.000\u0111 cho \u0111\u00fang 1 ly nh\u01b0 b\u00ecnh th\u01b0\u1eddng.<\/p>\n<h3>V\u00ed d\u1ee5 2 \u2014 Kem ch\u1ed1ng n\u1eafng mua 2 t\u1eb7ng 1<\/h3>\n<p>Kem ch\u1ed1ng n\u1eafng 300.000\u0111\/tu\u00fdp, mua 2 t\u1eb7ng 1. B\u1ea1n tr\u1ea3 600.000\u0111 (cho 2 tu\u00fdp) v\u00e0 nh\u1eadn 3 tu\u00fdp. Gi\u00e1 m\u1ed7i tu\u00fdp = 600.000 \/ 3 = <strong>200.000\u0111<\/strong>. T\u1eeb 300.000\u0111 xu\u1ed1ng 200.000\u0111 l\u00e0 gi\u1ea3m 100.000\u0111, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng <span class=\"pt42-highlight\">\u2248 33,3%<\/span>. V\u1edbi s\u1ea3n ph\u1ea9m d\u00f9ng d\u00e0i h\u1ea1n v\u00e0 c\u00f3 h\u1ea1n s\u1eed d\u1ee5ng xa, \u0111\u00e2y l\u00e0 \u01b0u \u0111\u00e3i h\u1ee3p l\u00fd v\u00ec b\u1ea1n ch\u1eafc ch\u1eafn x\u00e0i h\u1ebft.<\/p>\n<h3>V\u00ed d\u1ee5 3 \u2014 \u00c1o thun mua 3 t\u1eb7ng 1<\/h3>\n<p>\u00c1o thun 199.000\u0111\/chi\u1ebfc, mua 3 t\u1eb7ng 1. B\u1ea1n tr\u1ea3 597.000\u0111 (cho 3 chi\u1ebfc) v\u00e0 nh\u1eadn 4 chi\u1ebfc. Gi\u00e1 m\u1ed7i chi\u1ebfc = 597.000 \/ 4 = <strong>149.250\u0111<\/strong>. M\u1ee9c gi\u1ea3m l\u00e0 <span class=\"pt42-highlight\">25%<\/span>. Nghe h\u1ea5p d\u1eabn, nh\u01b0ng c\u00e2u h\u1ecfi th\u1eadt l\u00e0: b\u1ea1n c\u00f3 c\u1ea7n t\u1edbi 4 chi\u1ebfc \u00e1o kh\u00f4ng? N\u1ebfu ch\u1ec9 c\u1ea7n 1 chi\u1ebfc, vi\u1ec7c b\u1ecf ra 597.000\u0111 \u0111\u1ec3 &#8220;\u0111\u01b0\u1ee3c gi\u1ea3m 25%&#8221; l\u00e0 b\u1ea1n \u0111ang chi nhi\u1ec1u h\u01a1n nhu c\u1ea7u g\u1ea5p 3 l\u1ea7n.<\/p>\n<h3>V\u00ed d\u1ee5 4 \u2014 So s\u00e1nh tr\u1ef1c ti\u1ebfp v\u1edbi voucher gi\u1ea3m gi\u00e1<\/h3>\n<div class=\"pt42-tablewrap\">\n<table>\n<thead>\n<tr>\n<th>T\u00ecnh hu\u1ed1ng<\/th>\n<th>Chi ph\u00ed th\u1ef1c<\/th>\n<th>S\u1ed1 m\u00f3n nh\u1eadn<\/th>\n<th>Gi\u00e1\/m\u00f3n<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Mua 1 t\u1eb7ng 1 (m\u00f3n 120k)<\/td>\n<td>120.000\u0111<\/td>\n<td>2<\/td>\n<td>60.000\u0111<\/td>\n<\/tr>\n<tr>\n<td>Voucher gi\u1ea3m 40% (m\u00f3n 120k)<\/td>\n<td>72.000\u0111<\/td>\n<td>1<\/td>\n<td>72.000\u0111<\/td>\n<\/tr>\n<tr>\n<td>Voucher gi\u1ea3m 50% (m\u00f3n 120k)<\/td>\n<td>60.000\u0111<\/td>\n<td>1<\/td>\n<td>60.000\u0111<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>N\u1ebfu b\u1ea1n ch\u1ec9 c\u1ea7n 1 m\u00f3n, voucher gi\u1ea3m 50% cho gi\u00e1 \u0111\u01a1n v\u1ecb b\u1eb1ng \u0111\u00fang &#8220;mua 1 t\u1eb7ng 1&#8221; nh\u01b0ng b\u1ea1n ch\u1ec9 chi 60.000\u0111 thay v\u00ec 120.000\u0111. Voucher gi\u1ea3m 40% cho gi\u00e1 \u0111\u01a1n v\u1ecb cao h\u01a1n nh\u01b0ng t\u1ed5ng chi th\u1ea5p nh\u1ea5t trong ba l\u1ef1a ch\u1ecdn n\u1ebfu b\u1ea1n th\u1ef1c s\u1ef1 ch\u1ec9 c\u1ea7n m\u1ed9t m\u00f3n. B\u00e0i h\u1ecdc: <strong>\u0111\u1eebng so % m\u1ed9t c\u00e1ch c\u00f4 l\u1eadp, h\u00e3y so c\u1ea3 t\u1ed5ng ti\u1ec1n b\u1ea1n ph\u1ea3i b\u1ecf ra l\u1eabn s\u1ed1 m\u00f3n b\u1ea1n th\u1ef1c s\u1ef1 d\u00f9ng<\/strong>.<\/p>\n<p>Mu\u1ed1n t\u1ef1 \u0111\u1ed1i chi\u1ebfu c\u00e1c k\u1ecbch b\u1ea3n nh\u01b0 tr\u00ean cho \u0111\u01a1n h\u00e0ng c\u1ee7a m\u00ecnh, b\u1ea1n c\u00f3 th\u1ec3 m\u1edf <a href=\"https:\/\/1phantram.com\/blog\/cach-tinh-phan-tram-giam-gia\">b\u00e0i h\u01b0\u1edbng d\u1eabn c\u00e1ch t\u00ednh ph\u1ea7n tr\u0103m gi\u1ea3m gi\u00e1<\/a> ho\u1eb7c d\u00f9ng th\u1eb3ng c\u00f4ng c\u1ee5 t\u00ednh tr\u00ean 1phantram.com.<\/p>\n<h2 id=\"pt42-s6\">6. Nh\u1eefng b\u1eaby t\u00e2m l\u00fd \u1ea9n sau khuy\u1ebfn m\u00e3i &#8220;mua M t\u1eb7ng N&#8221;<\/h2>\n<p>Con s\u1ed1 50% l\u00e0 to\u00e1n h\u1ecdc, nh\u01b0ng l\u00fd do khuy\u1ebfn m\u00e3i ki\u1ec3u n\u00e0y t\u1ed3n t\u1ea1i l\u1ea1i thu\u1ed9c v\u1ec1 t\u00e2m l\u00fd h\u1ecdc ti\u00eau d\u00f9ng. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng c\u00e1i b\u1eaby ph\u1ed5 bi\u1ebfn nh\u1ea5t:<\/p>\n<h3>B\u1eaby 1 \u2014 Bu\u1ed9c mua nhi\u1ec1u h\u01a1n nhu c\u1ea7u<\/h3>\n<p>\u0110\u00e2y l\u00e0 b\u1eaby l\u1edbn nh\u1ea5t. B\u1ea1n v\u00e0o c\u1eeda h\u00e0ng \u0111\u1ecbnh mua 1 m\u00f3n, ra v\u1ec1 v\u1edbi 2\u20134 m\u00f3n ch\u1ec9 v\u00ec &#8220;\u0111\u01b0\u1ee3c t\u1eb7ng&#8221;. S\u1ed1 ti\u1ec1n b\u1ea1n ti\u1ebft ki\u1ec7m tr\u00ean gi\u1ea5y t\u1edd (50%, 33%) kh\u00f4ng c\u00f3 \u00fd ngh\u0129a n\u1ebfu t\u1ed5ng ti\u1ec1n chi ra l\u1ea1i cao h\u01a1n d\u1ef1 \u0111\u1ecbnh v\u00e0 ph\u1ea7n l\u1edbn h\u00e0ng h\u00f3a d\u01b0 th\u1eeba n\u1eb1m im trong nh\u00e0. M\u1ed9t m\u00f3n &#8220;mi\u1ec5n ph\u00ed&#8221; b\u1ea1n kh\u00f4ng d\u00f9ng c\u00f3 gi\u00e1 tr\u1ecb th\u1ef1c b\u1eb1ng 0, th\u1eadm ch\u00ed \u00e2m n\u1ebfu t\u00ednh chi ph\u00ed l\u01b0u tr\u1eef.<\/p>\n<h3>B\u1eaby 2 \u2014 H\u00e0ng c\u1eadn date, c\u1ea7n x\u1ea3 g\u1ea5p<\/h3>\n<p>Kh\u00f4ng ph\u1ea3i ng\u1eabu nhi\u00ean m\u00e0 nhi\u1ec1u ch\u01b0\u01a1ng tr\u00ecnh mua 1 t\u1eb7ng 1 r\u01a1i v\u00e0o th\u1ef1c ph\u1ea9m, m\u1ef9 ph\u1ea9m, s\u1eefa. \u0110\u00e2y th\u01b0\u1eddng l\u00e0 h\u00e0ng g\u1ea7n h\u1ebft h\u1ea1n m\u00e0 c\u1eeda h\u00e0ng c\u1ea7n thanh l\u00fd nhanh. B\u1ea1n \u00f4m 2 h\u1ed9p s\u1eefa c\u00f2n 3 tu\u1ea7n h\u1ea1n d\u00f9ng th\u00ec r\u1ea5t kh\u00f3 u\u1ed1ng k\u1ecbp, v\u00e0 m\u00f3n &#8220;t\u1eb7ng&#8221; tr\u1edf th\u00e0nh r\u00e1c. Lu\u00f4n ki\u1ec3m tra <strong>h\u1ea1n s\u1eed d\u1ee5ng<\/strong> tr\u01b0\u1edbc khi h\u00e0o h\u1ee9ng v\u1edbi \u01b0u \u0111\u00e3i \u1edf nh\u00f3m h\u00e0ng d\u1ec5 h\u1ecfng.<\/p>\n<h3>B\u1eaby 3 \u2014 \u0110\u1ed9i gi\u00e1 tr\u01b0\u1edbc khi khuy\u1ebfn m\u00e3i<\/h3>\n<p>M\u1ed9t chi\u00eau kinh \u0111i\u1ec3n: c\u1eeda h\u00e0ng \u00e2m th\u1ea7m n\u00e2ng gi\u00e1 ni\u00eam y\u1ebft l\u00ean tr\u01b0\u1edbc ng\u00e0y khuy\u1ebfn m\u00e3i, r\u1ed3i tung ra &#8220;mua 1 t\u1eb7ng 1&#8221;. N\u1ebfu gi\u00e1 g\u1ed1c \u0111\u00e3 b\u1ecb \u0111\u1ed9i 30\u201340%, th\u00ec &#8220;gi\u1ea3m 50%&#8221; tr\u00ean gi\u00e1 \u0111\u1ed9i \u0111\u00f3 c\u00f3 khi v\u1eabn cao h\u01a1n gi\u00e1 b\u00ecnh th\u01b0\u1eddng ng\u00e0y th\u01b0\u1eddng. C\u00e1ch ph\u00f2ng tr\u00e1nh l\u00e0 ghi nh\u1edb ho\u1eb7c ch\u1ee5p l\u1ea1i gi\u00e1 g\u1ed1c tr\u01b0\u1edbc c\u00e1c \u0111\u1ee3t sale, ho\u1eb7c so gi\u00e1 v\u1edbi n\u01a1i kh\u00e1c.<\/p>\n<h3>B\u1eaby 4 \u2014 \u1ea2o gi\u00e1c &#8220;\u0111\u01b0\u1ee3c cho kh\u00f4ng&#8221;<\/h3>\n<p>T\u1eeb &#8220;T\u1eb6NG&#8221;, &#8220;FREE&#8221;, &#8220;MI\u1ec4N PH\u00cd&#8221; k\u00edch ho\u1ea1t ph\u1ea3n \u1ee9ng c\u1ea3m x\u00fac m\u1ea1nh h\u01a1n nhi\u1ec1u so v\u1edbi con s\u1ed1 &#8220;-50%&#8221;, d\u00f9 gi\u00e1 tr\u1ecb y h\u1ec7t. Nghi\u00ean c\u1ee9u h\u00e0nh vi cho th\u1ea5y ng\u01b0\u1eddi ta s\u1eb5n s\u00e0ng x\u1ebfp h\u00e0ng v\u00e0 mua nhi\u1ec1u h\u01a1n khi th\u1ea5y ch\u1eef &#8220;mi\u1ec5n ph\u00ed&#8221;. Nh\u00e0 b\u00e1n l\u1ebb bi\u1ebft r\u00f5 \u0111i\u1ec1u n\u00e0y, n\u00ean &#8220;mua 1 t\u1eb7ng 1&#8221; b\u00e1n ch\u1ea1y h\u01a1n &#8220;gi\u1ea3m 50%&#8221; d\u00f9 b\u1ea3n ch\u1ea5t gi\u1ed1ng nhau.<\/p>\n<p>\n<strong>Nguy\u00ean t\u1eafc v\u00e0ng:<\/strong> Tr\u01b0\u1edbc khi h\u01b0\u1edfng \u01b0u \u0111\u00e3i, h\u00e3y tr\u1ea3 l\u1eddi hai c\u00e2u \u2014 (1) M\u00ecnh c\u00f3 c\u1ea7n \u0111\u1ee7 s\u1ed1 l\u01b0\u1ee3ng n\u00e0y kh\u00f4ng? (2) Gi\u00e1 g\u1ed1c c\u00f3 b\u1ecb \u0111\u1ed9i l\u00ean kh\u00f4ng? N\u1ebfu c\u1ea3 hai \u0111\u1ec1u \u1ed5n, h\u00e3y mua.<\/p>\n<h2 id=\"pt42-s7\">7. C\u00e1ch ki\u1ec3m tra gi\u00e1 \u0111\u01a1n v\u1ecb th\u1eadt trong 3 gi\u00e2y<\/h2>\n<\/p>\n<p>V\u0169 kh\u00ed m\u1ea1nh nh\u1ea5t c\u1ee7a ng\u01b0\u1eddi mua th\u00f4ng minh l\u00e0 bi\u1ebft t\u00ednh <strong>gi\u00e1 \u0111\u01a1n v\u1ecb th\u1ef1c<\/strong> (gi\u00e1 m\u1ed7i m\u00f3n sau khuy\u1ebfn m\u00e3i). \u0110\u00e2y l\u00e0 c\u00e1ch l\u00e0m nhanh:<\/p>\n<ol>\n<li><strong>L\u1ea5y t\u1ed5ng ti\u1ec1n ph\u1ea3i tr\u1ea3<\/strong> = gi\u00e1 g\u1ed1c \u00d7 s\u1ed1 m\u00f3n ph\u1ea3i mua (M).<\/li>\n<li><strong>Chia cho t\u1ed5ng s\u1ed1 m\u00f3n nh\u1eadn v\u1ec1<\/strong> = M + N.<\/li>\n<li>K\u1ebft qu\u1ea3 l\u00e0 gi\u00e1 m\u1ed7i m\u00f3n th\u1eadt. So v\u1edbi gi\u00e1 g\u1ed1c \u0111\u1ec3 bi\u1ebft m\u00ecnh gi\u1ea3m bao nhi\u00eau.<\/li>\n<\/ol>\n<p>V\u00ed d\u1ee5 t\u00ednh tay: m\u00f3n 80.000\u0111, ch\u01b0\u01a1ng tr\u00ecnh mua 3 t\u1eb7ng 1. T\u1ed5ng tr\u1ea3 = 80.000 \u00d7 3 = 240.000\u0111. S\u1ed1 m\u00f3n nh\u1eadn = 4. Gi\u00e1 m\u1ed7i m\u00f3n = 240.000 \/ 4 = 60.000\u0111. Gi\u1ea3m t\u1eeb 80.000 xu\u1ed1ng 60.000 = gi\u1ea3m 25%. Xong trong 10 gi\u00e2y.<\/p>\n<h3>M\u1eb9o t\u00ednh nh\u1ea9m si\u00eau nhanh t\u1ea1i qu\u1ea7y<\/h3>\n<ul>\n<li><strong>Mua 1 t\u1eb7ng 1<\/strong> \u2192 chia \u0111\u00f4i gi\u00e1 l\u00e0 ra (gi\u1ea3m 50%).<\/li>\n<li><strong>Mua 2 t\u1eb7ng 1<\/strong> \u2192 l\u1ea5y gi\u00e1 g\u1ed1c chia 3 r\u1ed3i c\u1ed9ng d\u1ed3n, ho\u1eb7c nh\u1edb lu\u00f4n \u2248 33% (gi\u1ea3m kho\u1ea3ng 1\/3).<\/li>\n<li><strong>Mua 3 t\u1eb7ng 1<\/strong> \u2192 gi\u1ea3m 1\/4 = 25%.<\/li>\n<li><strong>Mua 4 t\u1eb7ng 1<\/strong> \u2192 gi\u1ea3m 1\/5 = 20%.<\/li>\n<\/ul>\n<p>Khi con s\u1ed1 kh\u00f4ng tr\u00f2n (nh\u01b0 mua 2 t\u1eb7ng 1, mua 5 t\u1eb7ng 1) ho\u1eb7c khi b\u1ea1n mu\u1ed1n so s\u00e1nh nhi\u1ec1u ch\u01b0\u01a1ng tr\u00ecnh c\u00f9ng l\u00fac, vi\u1ec7c b\u1ea5m m\u00e1y s\u1ebd ch\u00ednh x\u00e1c v\u00e0 nhanh h\u01a1n t\u00ednh nh\u1ea9m. B\u1ea1n c\u00f3 th\u1ec3 m\u1edf <a href=\"https:\/\/1phantram.com\/\">c\u00f4ng c\u1ee5 t\u00ednh ph\u1ea7n tr\u0103m tr\u00ean 1phantram.com<\/a> \u0111\u1ec3 ra k\u1ebft qu\u1ea3 t\u1ee9c th\u00ec, ho\u1eb7c tham kh\u1ea3o th\u00eam <a href=\"https:\/\/1phantram.com\/blog\/tinh-phan-tram-chenh-lech\">c\u00e1ch t\u00ednh ph\u1ea7n tr\u0103m ch\u00eanh l\u1ec7ch gi\u1eefa hai m\u1ee9c gi\u00e1<\/a> khi mu\u1ed1n so gi\u00e1 tr\u01b0\u1edbc v\u00e0 sau khuy\u1ebfn m\u00e3i.<\/p>\n<h2 id=\"pt42-s8\">8. M\u1eb9o cho ng\u01b0\u1eddi mua v\u00e0 ng\u01b0\u1eddi b\u00e1n<\/h2>\n<h3>Cho ng\u01b0\u1eddi mua th\u00f4ng minh<\/h3>\n<ul>\n<li><strong>T\u00ednh gi\u00e1 \u0111\u01a1n v\u1ecb tr\u01b0\u1edbc, \u0111\u1eebng nh\u00ecn %.<\/strong> Con s\u1ed1 ph\u1ea7n tr\u0103m d\u1ec5 g\u00e2y \u1ea3o gi\u00e1c; gi\u00e1 m\u1ed7i m\u00f3n m\u1edbi l\u00e0 th\u1ee9 b\u1ea1n th\u1ef1c s\u1ef1 tr\u1ea3.<\/li>\n<li><strong>Ch\u1ec9 mua n\u1ebfu c\u1ea7n \u0111\u1ee7 s\u1ed1 l\u01b0\u1ee3ng.<\/strong> &#8220;T\u1eb7ng th\u00eam&#8221; ch\u1ec9 c\u00f3 gi\u00e1 tr\u1ecb khi b\u1ea1n d\u00f9ng h\u1ebft. N\u1ebfu kh\u00f4ng, \u0111\u00f3 l\u00e0 ti\u1ec1n ch\u1ebft.<\/li>\n<li><strong>Ki\u1ec3m tra h\u1ea1n s\u1eed d\u1ee5ng v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng<\/strong> v\u1edbi th\u1ef1c ph\u1ea9m, m\u1ef9 ph\u1ea9m, \u0111\u1ed3 t\u01b0\u01a1i.<\/li>\n<li><strong>So gi\u00e1 g\u1ed1c tr\u01b0\u1edbc sale<\/strong> \u0111\u1ec3 ph\u00e1t hi\u1ec7n chi\u00eau \u0111\u1ed9i gi\u00e1. Ch\u1ee5p m\u00e0n h\u00ecnh gi\u00e1 ng\u00e0y th\u01b0\u1eddng.<\/li>\n<li><strong>R\u1ee7 b\u1ea1n b\u00e8 chia \u0111\u01a1n.<\/strong> Mua 1 t\u1eb7ng 1 m\u00e0 m\u1ed7i ng\u01b0\u1eddi l\u1ea5y 1 m\u00f3n th\u00ec c\u1ea3 hai \u0111\u1ec1u \u0111\u01b0\u1ee3c gi\u1ea3m 50% th\u1eadt s\u1ef1 m\u00e0 kh\u00f4ng ph\u1ea3i \u00f4m h\u00e0ng d\u01b0.<\/li>\n<\/ul>\n<h3>Cho ng\u01b0\u1eddi b\u00e1n \/ ch\u1ee7 shop<\/h3>\n<ul>\n<li><strong>D\u00f9ng &#8220;mua 1 t\u1eb7ng 1&#8221; khi c\u1ea7n t\u0103ng s\u1ed1 l\u01b0\u1ee3ng b\u00e1n<\/strong> v\u00e0 gi\u1ea3i ph\u00f3ng t\u1ed3n kho nhanh, thay v\u00ec ch\u1ec9 gi\u1ea3m gi\u00e1 tr\u1ef1c ti\u1ebfp.<\/li>\n<li><strong>Ch\u1ecdn bi\u1ebfn th\u1ec3 ph\u00f9 h\u1ee3p m\u1ee5c ti\u00eau:<\/strong> mu\u1ed1n kh\u00e1ch mua nhi\u1ec1u h\u01a1n nh\u01b0ng bi\u00ean l\u1ee3i nhu\u1eadn v\u1eabn \u1ed5n th\u00ec &#8220;mua 2 t\u1eb7ng 1&#8221; (gi\u1ea3m 33%) an to\u00e0n h\u01a1n &#8220;mua 1 t\u1eb7ng 1&#8221; (gi\u1ea3m 50%).<\/li>\n<li><strong>Minh b\u1ea1ch gi\u00e1 g\u1ed1c.<\/strong> Kh\u00e1ch h\u00e0ng ng\u00e0y c\u00e0ng bi\u1ebft t\u00ednh; \u0111\u1ed9i gi\u00e1 r\u1ed3i gi\u1ea3m d\u1ec5 m\u1ea5t l\u00f2ng tin l\u00e2u d\u00e0i.<\/li>\n<li><strong>K\u1ebft h\u1ee3p h\u00e0ng c\u1eadn date v\u1edbi h\u00e0ng b\u00e1n ch\u1ea1y<\/strong> \u0111\u1ec3 v\u1eeba x\u1ea3 kho v\u1eeba kh\u00f4ng g\u00e2y c\u1ea3m gi\u00e1c &#8220;b\u00e1n h\u00e0ng s\u1eafp h\u1ebft h\u1ea1n&#8221;.<\/li>\n<\/ul>\n<p>Ch\u1ed1t \u0111\u01a1n th\u00f4ng minh h\u01a1n: ki\u1ec3m tra ngay % gi\u1ea3m th\u1eadt c\u1ee7a b\u1ea5t k\u1ef3 ch\u01b0\u01a1ng tr\u00ecnh &#8220;mua M t\u1eb7ng N&#8221; n\u00e0o.<\/p>\n<p><a href=\"https:\/\/1phantram.com\/\">M\u1edf c\u00f4ng c\u1ee5 t\u00ednh ph\u1ea7n tr\u0103m 1phantram.com \u2192<\/a><\/p>\n<h2 id=\"pt42-faq-title\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p (FAQ)<\/h2>\n<div class=\"pt42-faq\">\n<details>\n<summary>Mua 1 t\u1eb7ng 1 gi\u1ea3m bao nhi\u00eau ph\u1ea7n tr\u0103m?<\/summary>\n<p>Mua 1 t\u1eb7ng 1 gi\u1ea3m \u0111\u00fang 50% tr\u00ean gi\u00e1 \u0111\u01a1n v\u1ecb, kh\u00f4ng ph\u1ea3i 100%. B\u1ea1n nh\u1eadn 2 m\u00f3n nh\u01b0ng ch\u1ec9 tr\u1ea3 ti\u1ec1n cho 1 m\u00f3n, n\u00ean gi\u00e1 trung b\u00ecnh m\u1ed7i m\u00f3n b\u1eb1ng m\u1ed9t n\u1eeda gi\u00e1 g\u1ed1c. \u0110\u00e2y l\u00e0 m\u1ee9c gi\u1ea3m t\u1ed1i \u0111a c\u1ee7a lo\u1ea1i ch\u01b0\u01a1ng tr\u00ecnh n\u00e0y.<\/p>\n<\/details>\n<details>\n<summary>C\u00f4ng th\u1ee9c t\u00ednh ph\u1ea7n tr\u0103m gi\u1ea3m cho &#8220;mua M t\u1eb7ng N&#8221; l\u00e0 g\u00ec?<\/summary>\n<p>C\u00f4ng th\u1ee9c l\u00e0 % gi\u1ea3m th\u1ef1c = N \/ (M + N) \u00d7 100%, v\u1edbi M l\u00e0 s\u1ed1 m\u00f3n ph\u1ea3i mua v\u00e0 N l\u00e0 s\u1ed1 m\u00f3n \u0111\u01b0\u1ee3c t\u1eb7ng. V\u00ed d\u1ee5 mua 2 t\u1eb7ng 1 = 1\/(2+1) \u2248 33,3%; mua 3 t\u1eb7ng 1 = 1\/(3+1) = 25%.<\/p>\n<\/details>\n<details>\n<summary>&#8220;Mua 1 t\u1eb7ng 1&#8221; v\u00e0 &#8220;gi\u1ea3m 50%&#8221; c\u00f3 gi\u1ed1ng nhau kh\u00f4ng?<\/summary>\n<p>V\u1ec1 gi\u00e1 m\u1ed7i m\u00f3n th\u00ec gi\u1ed1ng nhau (\u0111\u1ec1u c\u00f2n m\u1ed9t n\u1eeda). Nh\u01b0ng &#8220;mua 1 t\u1eb7ng 1&#8221; b\u1eaft b\u1ea1n mua v\u00e0 tr\u1ea3 ti\u1ec1n cho 2 m\u00f3n, c\u00f2n &#8220;gi\u1ea3m 50%&#8221; cho ph\u00e9p mua 1 m\u00f3n v\u1edbi n\u1eeda gi\u00e1. N\u1ebfu b\u1ea1n ch\u1ec9 c\u1ea7n 1 m\u00f3n, &#8220;gi\u1ea3m 50%&#8221; ti\u1ebft ki\u1ec7m t\u1ed5ng ti\u1ec1n h\u01a1n.<\/p>\n<\/details>\n<details>\n<summary>Mua 2 t\u1eb7ng 1 gi\u1ea3m bao nhi\u00eau ph\u1ea7n tr\u0103m?<\/summary>\n<p>Mua 2 t\u1eb7ng 1 gi\u1ea3m kho\u1ea3ng 33,3%. B\u1ea1n tr\u1ea3 ti\u1ec1n cho 2 m\u00f3n v\u00e0 nh\u1eadn 3 m\u00f3n, n\u00ean gi\u00e1 m\u1ed7i m\u00f3n b\u1eb1ng 2\/3 gi\u00e1 g\u1ed1c, t\u1ee9c ti\u1ebft ki\u1ec7m 1\/3. M\u1ee9c n\u00e0y th\u1ea5p h\u01a1n mua 1 t\u1eb7ng 1 (50%).<\/p>\n<\/details>\n<details>\n<summary>V\u00ec sao mua 1 t\u1eb7ng 1 l\u1ea1i l\u1ee3i h\u01a1n mua 2 t\u1eb7ng 1?<\/summary>\n<p>V\u00ec \u1edf mua 1 t\u1eb7ng 1, m\u00f3n mi\u1ec5n ph\u00ed chia cho 2 m\u00f3n (50%), c\u00f2n \u1edf mua 2 t\u1eb7ng 1, c\u00f9ng 1 m\u00f3n mi\u1ec5n ph\u00ed l\u1ea1i chia cho 3 m\u00f3n (33,3%). C\u00e0ng ph\u1ea3i mua nhi\u1ec1u \u0111\u1ec3 nh\u1eadn c\u00f9ng s\u1ed1 qu\u00e0 th\u00ec t\u1ef7 l\u1ec7 gi\u1ea3m c\u00e0ng nh\u1ecf.<\/p>\n<\/details>\n<details>\n<summary>L\u00e0m sao ki\u1ec3m tra khuy\u1ebfn m\u00e3i c\u00f3 th\u1eadt s\u1ef1 l\u1ee3i kh\u00f4ng?<\/summary>\n<p>H\u00e3y t\u00ednh gi\u00e1 \u0111\u01a1n v\u1ecb th\u1eadt: l\u1ea5y t\u1ed5ng ti\u1ec1n ph\u1ea3i tr\u1ea3 chia cho t\u1ed5ng s\u1ed1 m\u00f3n nh\u1eadn v\u1ec1, r\u1ed3i so v\u1edbi gi\u00e1 g\u1ed1c tr\u01b0\u1edbc sale. Ki\u1ec3m tra th\u00eam h\u1ea1n s\u1eed d\u1ee5ng v\u00e0 xem gi\u00e1 g\u1ed1c c\u00f3 b\u1ecb \u0111\u1ed9i l\u00ean kh\u00f4ng. B\u1ea1n c\u00f3 th\u1ec3 d\u00f9ng c\u00f4ng c\u1ee5 t\u00ednh ph\u1ea7n tr\u0103m tr\u00ean 1phantram.com \u0111\u1ec3 ra con s\u1ed1 nhanh v\u00e0 ch\u00ednh x\u00e1c.<\/p>\n<\/details>\n<\/div>\n<p style=\"margin-top:28px;font-size:15px;color:#6b7280\">T\u00f3m l\u1ea1i: \u0111\u1eebng \u0111\u1ec3 ch\u1eef &#8220;T\u1eb6NG&#8221; \u0111\u00e1nh l\u1eeba. Mua 1 t\u1eb7ng 1 l\u00e0 gi\u1ea3m 50%, v\u00e0 m\u1ecdi ch\u01b0\u01a1ng tr\u00ecnh &#8220;mua M t\u1eb7ng N&#8221; \u0111\u1ec1u quy v\u1ec1 m\u1ed9t c\u00f4ng th\u1ee9c duy nh\u1ea5t N\/(M+N). N\u1eafm ch\u1eafc n\u00f3, t\u00ednh gi\u00e1 \u0111\u01a1n v\u1ecb th\u1eadt, v\u00e0 ch\u1ec9 mua khi b\u1ea1n th\u1ef1c s\u1ef1 c\u1ea7n \u2014 \u0111\u00f3 l\u00e0 c\u00e1ch ti\u00eau ti\u1ec1n th\u00f4ng minh nh\u1ea5t.<\/p>\n<p><script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Mua 1 t\u1eb7ng 1 gi\u1ea3m bao nhi\u00eau ph\u1ea7n tr\u0103m?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Mua 1 t\u1eb7ng 1 gi\u1ea3m \u0111\u00fang 50% tr\u00ean gi\u00e1 \u0111\u01a1n v\u1ecb, kh\u00f4ng ph\u1ea3i 100%. B\u1ea1n nh\u1eadn 2 m\u00f3n nh\u01b0ng ch\u1ec9 tr\u1ea3 ti\u1ec1n cho 1 m\u00f3n, n\u00ean gi\u00e1 trung b\u00ecnh m\u1ed7i m\u00f3n b\u1eb1ng m\u1ed9t n\u1eeda gi\u00e1 g\u1ed1c. \u0110\u00e2y l\u00e0 m\u1ee9c gi\u1ea3m t\u1ed1i \u0111a c\u1ee7a lo\u1ea1i ch\u01b0\u01a1ng tr\u00ecnh n\u00e0y.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"C\u00f4ng th\u1ee9c t\u00ednh ph\u1ea7n tr\u0103m gi\u1ea3m cho mua M t\u1eb7ng N l\u00e0 g\u00ec?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"C\u00f4ng th\u1ee9c l\u00e0 ph\u1ea7n tr\u0103m gi\u1ea3m th\u1ef1c = N \/ (M + N) \u00d7 100%, v\u1edbi M l\u00e0 s\u1ed1 m\u00f3n ph\u1ea3i mua v\u00e0 N l\u00e0 s\u1ed1 m\u00f3n \u0111\u01b0\u1ee3c t\u1eb7ng. 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B\u1ea1n c\u00f3 th\u1ec3 d\u00f9ng c\u00f4ng c\u1ee5 t\u00ednh ph\u1ea7n tr\u0103m tr\u00ean 1phantram.com \u0111\u1ec3 ra con s\u1ed1 nhanh v\u00e0 ch\u00ednh x\u00e1c.\"\n      }\n    }\n  ]\n}\n<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>B\u1ea1n \u0111\u1ee9ng tr\u01b0\u1edbc qu\u1ea7y h\u00e0ng, t\u1ea5m bi\u1ec3n to \u0111\u00f9ng ghi &#8220;MUA 1 T\u1eb6NG 1&#8221;, v\u00e0 trong \u0111\u1ea7u b\u1eadt l\u00ean m\u1ed9t suy ngh\u0129 quen thu\u1ed9c: &#8220;Tr\u1eddi,&#8230;<\/p>\n","protected":false},"author":1,"featured_media":1450,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"rank_math_title":"Mua 1 T\u1eb7ng 1: Th\u1ef1c S\u1ef1 B\u1ea1n \u0110ang Gi\u1ea3m Bao Nhi\u00eau P... | 1Ph\u1ea7n Tr\u0103m","rank_math_description":"H\u01b0\u1edbng d\u1eabn chi ti\u1ebft v\u1ec1 mua 1 t\u1eb7ng 1 th\u1ef1c s\u1ef1 b\u1ea1n \u0111ang gi\u1ea3m bao nhi\u00eau: c\u00f4ng th\u1ee9c, v\u00ed d\u1ee5 th\u1ef1c t\u1ebf, m\u1eb9o v\u00e0 c\u00f4ng c\u1ee5 t\u00ednh online mi\u1ec5n ph\u00ed t\u1ea1i 1phantram.com.","rank_math_focus_keyword":"mua 1 t\u1eb7ng 1 th\u1ef1c s\u1ef1 b\u1ea1n \u0111ang gi\u1ea3m bao nhi\u00eau","footnotes":""},"categories":[35],"tags":[],"class_list":["post-1449","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-giam-gia-khuyen-mai"],"_links":{"self":[{"href":"https:\/\/1phantram.com\/blog\/wp-json\/wp\/v2\/posts\/1449","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=1449"}],"version-history":[{"count":1,"href":"https:\/\/1phantram.com\/blog\/wp-json\/wp\/v2\/posts\/1449\/revisions"}],"predecessor-version":[{"id":1504,"href":"https:\/\/1phantram.com\/blog\/wp-json\/wp\/v2\/posts\/1449\/revisions\/1504"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/1phantram.com\/blog\/wp-json\/wp\/v2\/media\/1450"}],"wp:attachment":[{"href":"https:\/\/1phantram.com\/blog\/wp-json\/wp\/v2\/media?parent=1449"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/1phantram.com\/blog\/wp-json\/wp\/v2\/categories?post=1449"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/1phantram.com\/blog\/wp-json\/wp\/v2\/tags?post=1449"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}