问题啊啊啊啊

ssysyjzmf

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?
答案是[100（k-m)]/100(100+m)

想先请问各位大神，这道题目什么意思啊？

苗苗心圃G

去年X股每股的价格增加了百分之k，X股每股的收入增加了百分之m且k大于m，问每股价格与每股收入的比率，用m来表示k

应该是这个意思。。。不对的话肯请指教

angelhxl

去年每股价增加了k%，收入增加m%，问股价与收益的比率增加了多少percent。

答案给错了啊，分母没有100乘了，那个100=percent了，答案应该为：100(k-m)/(100+m)  percent。

ssysyjzmf

这位大神，能不能把思路说一下啊~~

naoyixue

假设原来的P1( original price) 和 E1 ( original earing), 现在按照上涨的浮动，所以，P2( the latest price)=P 1( 1+k%), E2( the latest earning)=E1 ( 1+m%). 那么假设p1/e1需要上涨X%,那么才会有P2/E2. 那么列式 P1/E1 (1+x%)=P2/E2=P1(1+k%)/E1(1+m%) ,so we can offset P1 & E1, the final should be (1+x%)=(1+k%)/(1+m%), .....finally we can get the answer  x = 100(k-m)/(100+m)

covluted simplified process, so please allow me not to do so....