Chapter 4 - Proportions, Percents, and Solving Inequalities - 4.3 - More on Percents and Problem Solving - Problem Set 4.3 - Page 161: 23

Next year, the salesman will have to sell 161 cars.

Let X represent the amount of cars the salesman will have to sell next year. A guideline for this problem would be: Next year sales = This year sales + Increase in sales So, X = 140 + 140 $\times$ 15% X = 140 + 140 $\times$ .15 X = 140 + 21 X = 161 Next year, the salesman will have to sell 161 cars.