Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 8 - Personal Finance - 8.1 Percent, Sales Tax and Discounts - Exercise Set 8.1: 71

Answer

From January to February, the sales increased by $\$2400$

Work Step by Step

To express a percent as a decimal, we can move the decimal point two places to the left. $10\% = 0.1$ $20\% = 0.2$ We can calculate the decrease in customers. $decrease = (0.1)(60)$ $decrease = 6$ The number of customers in February is 54. We can calculate the price increase. $increase = (0.2)(\$500)$ $increase = \$100$ The new price in February is $\$600$ We can calculate the sales in January. $sales = (60)(\$500)$ $sales = \$30,000$ We can calculate the sales in February. $sales = (54)(\$600)$ $sales = \$32,400$ From January to February, the sales increased by $\$2400$
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