简答题
GRE
2012-10-13
From 2007 to 2008，a stock increased in value by 30%．From 2008 to 2009， that stock decreased in value by 10%．What was the overall percentage change of the stock’s value from 2007 to 2009
参考答案
暂无
答案解析
C．If you suppose that the stock started with a value of$100，an increase of 30% would bring it up to$130．Ten percent of 130 is 13，so a 10%drop in that value would take it down to$117．Thus the overall change would be an increase of 17%．
