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标题: TT GWD 4-17 [打印本页]

作者: biyanyt 时间: 2006-9-4 18:41
标题: TT GWD 4-17

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) %

Answer: D

不懂....k-m 是什么意思...

作者: biyanyt 时间: 2006-9-5 17:30

....谁和我说说啊

不懂啊

作者: aaronjiang 时间: 2006-9-6 09:40
for example: stock price inreases 5%, earning increases 4%. ==> k=5, m=4, then calculate the ratios.

作者: xmlvivian 时间: 2011-2-24 16:28
解释：假设前年Price per share =x, 前年earning per share =y 那么去年的price per share 为（1＋k％）x，去年的earning per share 为（1＋m％）y 求去年的price per share 与earning per share的比率比前年的比率增加了多少。
[（1＋k％）x]/[（1＋m％）y ]/(x/y)再减1
＝（1＋k％）/(1＋m％）再减1
＝（k%－m%)/(100-m%)
= [100(k-m)]/(100+m) %

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