laura drove 240 miles using 9 gallons of gas. At this rate, how many gallons of gas would she need to drive 216 miles?

Answer 1

Firstly find the number of gallons per mile = 9 gallons / 240 miles = 0.0375 gal/mile

So now if you need to travel 216 miles, the number of gallons need is = 0.0375 x 216=8.1 gal

Answer 2

240 miles / 9 gallons = 26.667 miles/gallon

216 miles / 26.667 miles/gallon = 8.1 gallons.

Hope this helps!