求详细解题步骤，谢谢

豚笔小蜡 · 发表于 2012-10-8 20:32:42

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?
k/m %
(k-m) %
[100(k-m)]/(100+k) %
[100(k-m)]/(100+m) %
[100(k-m)]/(100+k+m) %

ClaudiaJL · 发表于 2012-10-8 20:46:00

original ratio of price per share to earnings per share= P/E→
last year's ratio= (1+k%)*P/(1+m%)*E→

increase= (-)/=(1+k%)/(1+m%)-1=(k%-m%)/(1+m%)=(k-m)/(100+m)=D→[100(k-m)]/(100+m) %

ClaudiaJL · 发表于 2012-10-8 20:47:45

= =#符号没显示、、、、讨厌~~

第一行式子设为#1，第二行为#2
increase为(#2-#1)/#1

豚笔小蜡 · 发表于 2012-10-8 21:29:33

非常感谢！此题的问题好绕呀

ClaudiaJL · 发表于 2012-10-8 21:44:23

非常感谢！此题的问题好绕呀

-- by 会员豚笔小蜡 (2012/10/8 21:29:33)

不蟹蟹！加油~

求详细解题步骤，谢谢

所属分类: GMAT考试

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