求助！！

Jia0221

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?



A. k/m %

B. (k-m) %

C. [100(k-m)]/(100+k) %

D. [100(k-m)]/(100+m) %

E. [100(k-m)]/(100+k+m) %
这道题该如何翻译？怎么解？？

sdcar2010

Category  2009    2010
price            p       (100+k)% * p
earning        e       (100+m)% * e
p/e              p/e    [(100+k)/(100+m)] * [p/e]

percentage increase in p/e ratio = 100% * {[(100+k)/(100+m)] * [p/e] - [p/e]} / [p/e]
                                                = 100%* [(100+k)/(100+m) - 1]
                                                = 100% * [(k-m)/(100+m)]

Jia0221

懂啦懂啦，三克油~~