Question

A car gets 30 miles per gallon of gas and is driven 1000 miles per month. Gas costs 4$ per gallon. How much will the car's owner save on gas expenses in  one year by buying a new car that goes 50 miles for each gallon of gas?

Answer 1

well he spent 133.3333333333332$ in the first car
and only spent 80 in the new car

ok so he saved a total of 53.33333333333332$