Task: Question Answering
Input (English): Problem: one night a certain hotel rented 3 / 4 of its rooms . including 2 / 3 of their air conditioned rooms . if 3 / 5 of its rooms were air conditioned , what percent of the rooms that were not rented were air conditioned ? 
Options: a ) 20 , b ) 33 1 / 3 , c ) 35 , d ) 40 , e ) 80
Output (English): e