1道JJ,多谢

yiyi20

From the beginning of last year, Price per share increased K percent.
Earning per share increased M percent.
Question: ask the ratio in percentage for price per share to earning
per share in increase. In term of K, M.
能帮忙分析一下思路吗?,觉得题目就看不太明白.

suse

注意问价格与收益比的增加百分数。
[x(1+k%)/y(1+m%)-x/y]/x/y,
=(1+k%)/(1+m%)-1
这样比较容易理解。