这道题读的迷迷糊糊

yuexia

是一道xdf数学分册上的题：

On a purchase of $120, a store offered a payment plan consisting of a $20 down payment and 12 monthly payments of $10 each. What percent of the purchase price, to the nearest tenth of a percent, did the customer pay in interest by using this plan?

(A) 16.7%
(B) 30%
(C) 75.8%
(D) 106.7%
(E) 107.5%

gwxd

当然是A ，这个很简单呀

yuexia

我也在想是用利息$20去除以价格$120，我是对于后一句话中 to the nearest tenth of a percent 的意思不明白。

raonx

只取到百分之某数的小数点的十分位

yuexia

哦，谢了，呵呵！