1954 AMC 12 第 7 题

Question

一位家庭主妇购买促销连衣裙时节省了

\$2.50

。若她买裙子花了

\$25

，则她节省了约：

A housewife saved

\$2.50

in buying a dress on sale. If she spent

\$25

for the dress, she saved about:

8\%

9\%

10\%

11\%

12\%

将节省的金额加到促销价上，求出原价

Add the savings to the sale price to recover the original price

将

\frac{2.50}{27.50}

化为百分数

Compute

\frac{2.50}{27.50}

as a percentage

原价为

\$27.50

。节省的比例为

\frac{2.50}{27.50}=\frac1{11}\approx0.0909\text{，}

约为

9\%

。

因此，正确答案是 B。

The original price was

\$27.50.

The fraction saved was

\frac{2.50}{27.50}=\frac1{11}\approx0.0909,

or about

9\%.

Thus, the correct answer is B.

其他年份的第 7 题