Question

cars use about 4/9 of the energy consumed by the transportation industrial busus and trains use 1/6 how much more energy is used by cars than by busus and trains

Answer 1

cars use 4/9
buses and trains use 1/6

4/9 - 1/6 = 8/18 - 3/18 = 5/18 <== so cars use 5/18 more then buses and trains