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gwxd:
From the beginning of last year, Price per share increased K percent. Earning per share increased M percent. Question: ask the ratio in percentage for price per share to earning per share in increase. In term of K, M.
[确认](K-M)/(100+M)。此题是一老JJ。
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设原Price=X,原Earning=Y
{[x(1+k/100)]/[y(1+m/100)] -(x/y)}/(x/y) |
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