AMC 8 2019 Problem 22
AMC8 2019 年第 22 题
百分比★★★★☆
A store increased the original price of a shirt by a certain percent and then decreased the new price by the same percent. Given that the resulting price was 84% of the original price, by what percent was the price increased and decreased?
一家商店把衬衫的原价提高了某个百分数，然后又把新价降低了同样的百分数。已知最终的价格是原价的 84％.问价格升高和降低了百分之多少?
- A.16
- B.20
- C.28
- D.36
- E.40
正确答案 · Correct Answer
E
解析 · Solution
解析整理中
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