Algebra: A Combined Approach (4th Edition)

by Martin-Gay, Elayn

Published by Pearson

ISBN 10: 0321726391

ISBN 13: 978-0-32172-639-1

Chapter 2 - Section 2.6 - Percent and Mixture Problem Solving - Exercise Set - Page 159: 17

Answer

30%

Work Step by Step

The area of the second rectangle is $\frac{28}{40}*100=70$% of the area of the first rectangle The decrease is 100-70=30%

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