One day a car rental agency rented 3/4 of its cars, including 4/5 of its cars with CD players. If 3/5 of its cars have CD players, what percent of the cars that were not rented had CD players?	Pick.
A) 23/40	B) 17/30	C) 12/25	D) 7/15	E) 3/10
The cars with CD players which were not rented is (1/5)(3/5) = 3/25 of all the cars.   The cars which were not rented is 1/4 of all the cars.   The percent of non-rented cars which had 12/25D players is (3/25) / (1/4) = 12/25   The answer is 12/25.
<result>C</result>
One day a car rental agency rented 3/4 of its cars, including 4/5 of its cars with CD players. If 3/5 of its cars have CD players, what percent of the cars that were not rented had CD players?