If it takes 18 gallons of gas to go 400 miles how many gallons would it take to go 300 miles

A. 5.5 gallons

B. 13.5 gallons

C. 16.6 gallons

D. 22.2 gallons

E. 24 gallons

We will use the ratio and proportion method (an equation formed with two ratios that are equal) to solve the question "if it takes 18 gallons of gas to go 400 miles, how many gallons would it take to go 300 miles?"

Let x = the number of gallons for the gas to go 300 miles

18:400=X:300

400x=300*18

400x=5400

X=5400/400

X=13.5 so the answer is B.