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

1000/30 * $4 = A

1000/50 * $4 = B

Subtract B from A.