请教一道GWD里面的数学题

natalietong

Last year the price per share of Stock X increased by k percent and the earnings per share of Stock X increased by m percent, where k is greater than m.  By what percent did the ratio of price per share to earnings per share increase, in terms of k and m?
有人能帮忙解答一下吗？

gmatmba

price x; earning y
前年：ratio of price to earning is x/y
去年：price 变成x(1+K), earning 变成 y (1+m)；ratio of price to earning is [x(1+K)]/[y (1+m)]
问去年比前年这个比例长了多少，俩式子一减

natalietong

太感谢了！！！看来是我题目没有搞清楚，没有看明白是问比例增长了多少。感谢大侠~~