2. 外语
  3. If the price of the clothes decreases from $25 to $20, what is the percent decrease in price?

If the price of the clothes decreases from $25 to $20, what is the percent decrease in price?

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问题 If the price of the clothes decreases from $25 to $20, what is the percent decrease in price?
选项 A、4％
B、25％
C、20％
D、50％
E、5％
答案C
解析 首先要求出减少量，本题中减少量为25-20=5；但现在是用5除以25，还是除以20呢?注意：分母还应该是原来没有降价时候的量，即25，所以减少的百分比为5/25=20％。正确答案为C。
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