A certain candy manufacturer reduced the weight of candy bar M by 20% but left the price unchanged. What was the resulting percent increase in the price per ounce of candy bar M?
A. 5%; B. 10%; C. 15%; D. 20%; E. 25%
答案为E. 25%
请教该答案是如何得出的?
举报
假设原来的M重量是5 ounce , 售价5块。那么1ounce就是1块钱。
现在重量降20%,到4ounce,但是售价5块不变,那么现在就是1ounce 1.25块。
(1。25-1)/1=25%所以升高了25%。
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