Basic College Mathematics (10th Edition)

Published by Pearson
ISBN 10: 0134467795
ISBN 13: 978-0-13446-779-5

Chapter 6 - Percent - 6.2 Percents and Fractions - 6.2 Exercises - Page 401: 93



Work Step by Step

90% of a number is equal to 100% minus 10%. Therefore, a shortcut to finding 90% of a number is to find 10% by moving the decimal one space to the left, and then subtract this from the whole number. 90% of 450=450-45.0=405
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