Basic College Mathematics (10th Edition)

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

Chapter 6 - Percent - 6.4 Using Proportions to Solve Percent Problems - 6.4 Exercises - Page 422: 69


231 used some other method of payment.

Work Step by Step

If 85% used PayPal, 100-85=15% used some other form of payment. The whole is 1540. The percent is 15%. The part is unknown. $\frac{x}{1540} = \frac{15}{100}$ $100x = 1540\times15$ $\frac{100x}{100} = \frac{23100}{100}$ $x = 231$
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