Question

Samantha fills her car's gas tank. It now has 18 gallons of gas. She uses 1/2

of the gas when she drives to the beach. Then, she uses 3/4 of the
remaining gas when she drives to the mall. How many gallons of gas does
Samantha's car have left? *

Answer 1

18 x 1/2 = 9

18 - 9 = 9

9 x 3/4 = 27/4

9 - 27/4 = 2 1/4 or 2.25 gallons