Chapter 4 - Proportions, Percents, and Solving Inequalities - 4.3 - More on Percents and Problem Solving - Problem Set 4.3 - Page 161: 31

Hector should expect to get 28.32 miles per gallon.

We can use the following guideline to solve this problem, Current gas mileage + Increase = New gas mileage So, 24 + 18% $\times$ 24 = New gas mileage 24 + .18 $\times$ 24 = New gas mileage 24 + 4.32 = New gas mileage 28.32 = New gas mileage Hector should expect to get 28.32 miles per gallon.