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充500贈送50,再打八折,請教下,最終是打了幾折?
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請教下,最終是打了幾折?
500/(500+50)*0.8=0.73
2019 05/15 19:11
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84785035 ![](/wenda/_nuxt/img/reply1.d92ea43.png)
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2019 05/15 19:13
550打八折是優(yōu)惠了110.但這個數(shù)字不是以500為基數(shù),換算成500為基數(shù)是100的優(yōu)惠,100+贈送的50是150,(500-150)÷500=0.7 這樣對不?
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吳少琴老師 ![](/wenda/_nuxt/img/reply2.28c7604.png)
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2019 05/15 19:16
你是先送再打八折,又不是打完折再送
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