Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 4 - Proportions, Percents, and Solving Inequalities - Chapter 4 Review Problem Set: 47

Answer

220 students received reduced lunch prices last year.

Work Step by Step

A guideline for this problem would be: Current number of students = Last year number of students + Amount increase in the number of students. Let x represent the number of students that received reduced lunch prices last year. So: 253 = x + 15% $\times$ x 253 = x + 0.15x 253 = 1.15x Divide both sides by 1.15 220 = x 220 students received reduced lunch prices last year.
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