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) % 答案是D,但是我想请教一下它这个问题By what percent did the ratio of price per share to earnings per share increase, in terms of k and m是什么意思?是什么和什么比较,分子和分母分别是什么?谢谢啦