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【OG20-P178-207题】
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 ?
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(1+K%)/(1+m%)-1
=(100+K)%/(100+m)%-1
=(100+k-100-m)%/(100+M)%
=(k-m)/(100+m)
=100(k-m)/(100+m) %选D
题目讨论 (10条评论)

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我必须上分
(price-earning)/earning
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0 回复 2022-01-19 15:07:14
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斗牛梗今天学习了吗
A增加了k%,B增加了m%, 求A/B的比率(和先前比)增加了百分之几 设原来A的量为a,B的量为b,原先比率A/B=a/b ①。(胆大的高手其实都直接设1) 后来比率=(1+k%)a/(1+m%)b② 所求值=(②-①)/①即为答案。
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0 回复 2021-11-05 19:41:28
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贾思敏
By what percent did the ratio of price per share to earnings per share increase, in terms of k and m ? (price-earning)/earning
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0 回复 2021-09-24 18:15:30
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如果有时间的话我也能做对
=(100+K)%/(100+m)%-1 =(100+k-100-m)%/(100+M)% 解析里面这一步是怎么进化得出的?能不能多写几步我看不懂?附带解释
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0 回复 2021-07-13 23:26:36
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如果有时间的话我也能做对
去年增长了k,是较前年的基础上增长了?还是看不懂。
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0 回复 2021-07-10 19:08:45
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451431chao
题目要求就是 “价格:收入”…没看懂,反过来了
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0 回复 2020-10-12 18:06:30
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255932mbr
设去年price是a,今年是 a(1+k%), 去年earnings是b,今年是b(1+m%),(k>m) 问去年a/b的ratio,和今年涨价后的ratio比,增长了百分之多少。 去年是a/b,今年是(1+k%)a/ (1+m%)b, 用今年/去年-1,即增长比率 即(1+k%)/(1+m%)-1,经过计算整理可得D。
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0 回复 2019-09-03 16:03:43
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孙大妮
设去年price是a,earning是b,两者ratio是a/b;今年price是a(1+k%),earning是b(1+m%),ratio是a(1+k%)/b(1+m%),那么ratio增长的百分比应该是a(1+k%)/b(1+m%)-a/b再除以a/b,题目已有percentage,所以化简以后是(k-m)/(100+m)
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0 回复 2018-11-28 22:19:32
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大树
(1+K%)/(1+m%)-1 为什么需要-1?
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0 回复 2018-10-03 11:45:38
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李叶子二猫回复大树
因为本来是{[(1+k%)P/(1+m%)E]-P/E}/(P/E)来算的
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0 回复 2019-09-19 13:54:48
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东坡狼王ren
看不懂问句,有谁能解释一下吗?
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0 回复 2018-08-06 14:41:07
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市民小周回复东坡狼王ren
Ratio 增长的百分比,所以是(新-旧)/旧
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0 回复 2019-01-04 22:23:12
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