The charge for a single room at Hotel P 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?
(A) 15%
(B) 20%
(C) 40%
(D) 50%
(E) 150%
Ans: (B)
感覺這題明明很簡單,搞不懂自己腦筋卡在哪.....可能快被GMAC搞瘋了!!
P=0.75R --->R=1.33P
P=0.9Q --->Q=1.11P
R-Q=0.22=22% ....到底怎麼算出20%的,哈!!
