GWD题，在线等

sierrapan

The charge for a single room at Hotel    is 25 percent less than the charge for a single room at Hotel R  and 10 percent less than the charge for a single room at Hotel G. The charge for a single room at Hotel R  is what percent greater than the charge for a single room at Hotel G ?
0.2

sierrapan

怎么算呀，谢谢~

P为X，则R为1.25x，G为1.1x，那么答案应该是（1.25x-1.1x）/1.1x 为什么不对呢？

xiuyizhang

设R charge X   设G charge Y  那么P 就是（1-25%）x      同时P也是（1-10%）Y
两个式子相等 就能得出X Y 的关系 x是6/5y  所以是2o%

D小妖

(1-25%)R=p , R=4P/3

(1-10%)G=P  , G=10P/9

(R-G)/G=0.2

cuteyb

答案是0.2? 为什么我算出来是0.15..