the gas tank of a bus is 3/4 full, it uses 1/5 OF the gas in the tank, what fraction of the tank is left,
+37170 You COULD subtract like this 3/4 - 3/4(1/5)
or you could just multiply. If you USE 1/5 of the gas, then 4/5 is left 3/4 x 4/5 = 12/20 = 3/5 tank left
