Question

Zoomfast Tire & Battery stores are selling new steel-belted radial tires. They promise that when these tires are used your car will get 10% better gasoline mileage. If Gloria's red convertible now goes 420 miles on a tank of gasoline, how far could she drive on a tank if she switched to the new tires?

Answer 1

462

Explanation:

to find 10% of 420 you take

420 x .10 = 42

then add 42 to 420

420+42=462

Answer 2

462 mi

Explanation:

Gloria gets 420 mi/tank.

10 % of 420 is

420 × 0.10 = 42 mi

She will be able to drive an extra 42 mi.

420 + 42 = 462 mi

With her new tires, a tank of gas will take her 462 mi.