[計量] JJ 數學請教
102 【比大小】A shop sells an item for 125 dollar and another shop sells an
item for 75 dollar.
ColA: percentage gained over 125 dollar if the item is bought from the shop
selling at 75 dollar.
ColB: 40%
答案：选A 官方：50/75 *100% > 40 %
賺了50元，售價125
利潤x, 125*x=50 x=40% Ans:C
這樣想有錯嗎??
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105 【计算题】Cost price of 11 pens are equal to selling price of 9 pens,
what is profit percent?
答案：22.2%
11*cost=9*price
profirt=(price-cost)/price
=2/11=0.18
請問是不是我搞錯了
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