※ 引述《oranger (从新出发)》之铭言： : GWD3-18 : 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 ? : Ans: [100(k-m)]/(100+m)% : GWD5-28 : Last Sunday a certain store sold copies of Newspaper A for 1.00 each and : copies of Newspaper B for 1.25 each, and the store sold no other newspapers : that day. If r percent of the store's revenues from newspaper sales was from : Newapaper A and if p percent of the newspapers that the store sold were copies : of Newspaper A, which of the following expresses r in terms of p ? : Ans: 400p/(500-p) : 请帮忙解答一下,谢谢! 先解决3-18 设原始价格为Po, 原始EPS为Eo 则所求为 Po(1+k) Po -------- -- --- Eo(1+m) Eo Po(k-m) Eo ---------------- X100% = ----------X ----X 100% Po Eo(1+m) Po ---- Eo (k-m) 100(k-m) = -----X 100% = -------- # (1+m) (1+m)% --

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