One day a car rental agency rented 3/4 of its cars, including 5/6 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?  Choose the correct option:	A) 13/20	B) 11/15	C) 7/10	D) 4/7	E) 2/5
The cars with CD players which were not rented is (1/6)(3/5) = 1/10 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 CD players is (1/10) / (1/4) = 2/5   The answer is 2/5.
<result>E</result>
One day a car rental agency rented 3/4 of its cars, including 5/6 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?