问题
单项选择题
A family made a down payment of $75 and borrowed the balance on a set of encyclopedias that cost $400. The balance with interest was paid in 23 monthly payments of $16 each and a final payment of $9.
The amount of interest paid was what percent of the amount borrowed ？（）
A.6%
B.12%
C.14%
D.16%
E.20%
答案
参考答案：D
解析：
根据题意可知，该家庭所付的余款和利息一共是23×16+9=377美元。
因此利息为377-(400-75)=52美元利息与借款量的比
。
