Question

Michi put $7.50 worth of gas in her car. two co-workers who were riding to work with her offered to share the cost of the gas. one paid 1/2 of the total amount and the other paid 1/3 of the total amount. how much of the total amount was left

Answer 1

1.25.
7.50 x 1/2 = 3.75
+
7.50 x 1/3 = 2.50
= 6.25
7.50 - 6.25 = 1.25