Last year the price per share of Stock N increased by x percent and the earnings per share of Stock N increased by y percent, where x is greater than y. By what percent did the ratio of price per share to earnings per share increase, in terms of x and y?	Choose the correct choice from the following:
A) x/y%
B) (100+y) %
C) 100*(x-y)%
D) 100*(x-y)/(100+y) %
E) (x-y)/(100+y) %
Let P = the old price per share; E = the old earning per share. Thus P/E is the price to earning ratio before the increases   After the increase the new price is: P*(1+x/100) and the new earning is: E*(1 +y/100)   The new P/E is: (1+x/100)P/(1+y/100)E   The Percent of P/E increase = (new P/E - P/E)/(P/E). Subsititute new P/E to the equation we have:   [(1+x/100)/(1+y/100)*P/E - P/E]/(P/E)*100%. Simplifly the expression and you should get the answer to be:   100*(x-y)/(100+y) %   Answer : 100*(x-y)/(100+y) %
<result>D</result>
Last year the price per share of Stock N increased by x percent and the earnings per share of Stock N increased by y percent, where x is greater than y. By what percent did the ratio of price per share to earnings per share increase, in terms of x and y?