作者flac (老狮子)
看板GMAT
标题Re: [问题] 一题数学
时间Thu Jul 24 13:58:15 2008
※ 引述《yesican (yeah)》之铭言：
: 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 ?
: 题目看不太懂
: 答案是 [(100(k-m))/(100+m)] %
: what does the question mean?
PE ratio=price/eps(每股价格/每股盈余)
假设原本的PE ratio为P/E, 所以新的PE ratio=[(100+K)/(100+M)]*(P/E)
它是问你PE增加率
所以增加率为[新的PE ratio-旧的PE ratio]/旧的PE ratio
=[(100+K)/(100+M)]-1
=(K-M)/(100+M)
转换成%就是答案
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※ 编辑: flac 来自: 118.168.80.163 (07/24 14:00)
1F：推 yesican:感谢! 07/24 16:32