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?	Pick:
A) 20  B) 33 1/3  C) 35  D) 40  E) 80
Consider total # of rooms to be 100;   As 3/5 of the rooms are air conditioned then # of rooms that are air conditioned is 3/5*100= 
<gadget id="calculator">3/5*100</gadget>
<output>60</output>
60;   3/4 rooms were rented --&gt; 1/4*100=25 were NOT rented;   2/3 of air conditioned rooms were rented --&gt; 1/3*60 --  1/4*100= 
<gadget id="calculator"> --  1/4*100</gadget>
<output>25</output>
25 were NOT rented;   2/3 of air conditioned rooms were rented --&gt; 1/3*60=20 air conditioned room were NOT rented;   20/25  --  1/3*60= 
<gadget id="calculator">  --  1/3*60</gadget>
<output>20</output>
20 air conditioned room were NOT rented;   20/25=4/5=80%.   Answer: 80.
<result>E</result>
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?