请问GWD3 Q18

sunflower88

Q18:

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) %
请问这题是什么意思啊？
结果是怎么算出来的？

Fadaways

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)]

williams

主要还是看题得看懂啊  数学一般难不倒咱们天国学生。。。

sunflower88

哦。。。明白了~~
愣是没看懂题目！