看不懂 :(原题：on a purchase of $120, a store offered a payment plan consisting of a $20 down payments of $10 each. What percent of the purchase price, to the nearest tenth of a percent, did the custo>求告人指点!这道GMAT数学题的
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【答案】 to the nearest tenth of a percent是指精确到小数点后一位 如：16.7%,17.8% etc.题目意思是买了个120块钱的东西 你首付20 每个月付10块 问最后这个顾客选择这种（按揭）方法购买商品付出的利息/商品原价,即→利息=20+10*12-120（原价）=20 ,利息/原价=20/120=1/6精确到小数点后一位,即为16.7%.