The charge for a single room at Hotel P is 25 percent less than the charge for a single room at Hotel R and 15 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 ? Pick one:
A) 15 %  B) 20 %  C) 40 %  D) 13 %  E) 150 %

Rationale: "let rate in r = 100 x then p = 75 x g = 100 y p = 85 y thus 75 x = 85 y or x = 1.13 y ans r = 113 y so increase = 13 % answer : d"
Answer: D