Prealgebra (7th Edition)

Published by Pearson
ISBN 10: 0321955048
ISBN 13: 978-0-32195-504-3

Chapter 7 - Section 7.3 - Solving Percent Problems with Proportions - Exercise Set: 19

Answer

10

Work Step by Step

percent * base = amount $78\%\times x=7.8$ $0.78\times x=7.8$ $0.78x\div0.78=7.8\div0.78$ $x=10$
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