Question

David drove 420 miles using 18 gallons of gas. At this rate, how many gallons of gas would he need to drive 357 miles?

Answer 1

15.3 gallons

Explanation:

We can write a ratio

420 miles 357 miles

-------------- = --------------

18 gallons x gallon

Using cross products

420x = 357*18

420x =6426

Divide each side by 420

420x/420 = 6426/420

x =15.3