Prealgebra (7th Edition)

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

Chapter 7 - Section 7.3 - Integrated Review - Percent and Percent Problems: 30

Answer

100

Work Step by Step

78% of what number is 78 ? 78% $\times$ x = 78 Translate to an equation 0.78 $\times$ x =78 Write 78% as 0.78 $\frac{0.78x}{0.78}$=$\frac{78}{0.78}$ Divide both sides by 0.78 x=$\frac{7800}{78}$ x=100 Check 78% $\times$ x = 78 78% $\times$ 100= 78 0.78$\times$ 100=78 78=78
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