求助。。gwd的一道题

小培爱荷兰 · 发表于 2011-3-25 22:11:53

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) %
不理解题意，。。不知如何下手谢谢各位咯

juhw221 · 发表于 2011-3-25 23:31:25

翻一下：
去年X的每份额的价格增加了k%，X的每份额的回报增加了m%，k>m,问：以k和m来表示的话，每份额的价格和每份额的回报之比增加了百分之多少。
列出等式：
今年的ratio就是（1+k%）/(1+m%)
那么比较去年的增长就是：[(1+k%)/(1+m%)]-1 化简一下是选项D
但愿没写错。。。

kikisunflower · 发表于 2011-3-26 11:25:52

设去年Price和Earning分别为P0，E0
今年Price和Earning分别为P1，E1

问题是By what percent did the ratio of price per share to earnings per share increase？
问题的主干是By what percent did XXX increase？就是问XXX增长的百分数，XXX代表的又是“the ratio of price per share to earnings per share”，其实就是问P/E增长的百分数。

式子为(P1/E1-P0/E0)/(P0/E0)，化简后为(k-m)%

mijianture · 发表于 2011-3-26 16:36:34

设去年Price和Earning分别为P0，E0
今年Price和Earning分别为P1，E1

问题是By what percent did the ratio of price per share to earnings per share increase？
问题的主干是By what percent did XXX increase？就是问XXX增长的百分数，XXX代表的又是“the ratio of price per share to earnings per share”，其实就是问P/E增长的百分数。

式子为(P1/E1-P0/E0)/(P0/E0)，化简后为(k-m)%

-- by 会员 kikisunflower (2011/3/26 11:25:52)

PO/EO 为1吗？怎样化简为(k-m)% ?

kikisunflower · 发表于 2011-3-26 16:52:02

= =||，化简化错了一刚~忘记下面还有个分母在的那~答案D没错~
楼主对不起那

小培爱荷兰 · 发表于 2011-3-26 21:15:31

感谢啊。。。。。我发现读不懂题。。。就做不来。。。唉。谢谢啦。。。文字题太长就不想读咯

sdcar2010 · 发表于 2011-3-26 22:21:15

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)]

求助。。gwd的一道题

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