1. Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Chapter 5 Percents

2. Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. 5.7 Percent and Problem Solving: Sales Tax, Commission, and Discount

3. Martin-Gay, Developmental Mathematics, 2e 33 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Calculating Sales Tax and Total Price Sales Tax and Total Price sales tax = tax rate · purchase price total price = purchase price + sales tax

4. Martin-Gay, Developmental Mathematics, 2e 44 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Example sales taxpurchase pricetax rate sales tax = 6.5% · $1800 A gold and diamond bracelet sells for $1800. Find the total price if the sales tax rate is 6.5%. = 0.065 · $1800 = $117 Sales Tax $1800 + $117 = $1917 Total Price The total price for the bracelet was $1917.00

5. Martin-Gay, Developmental Mathematics, 2e 55 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Calculating Commission Commission commission = commission rate · sales

6. Martin-Gay, Developmental Mathematics, 2e 66 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Example commissionsales Commission rate $3575 = r · $32,500 The commission rate is 11%. A salesperson earned a commission of $3575 for selling $32,500 worth of books to various bookstores. Find the commission rate.

7. Martin-Gay, Developmental Mathematics, 2e 77 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Calculating Discount and Sale Price Discount and Sale Price amount of discount = discount rate · original price sale price = original price · amount of discount

8. Martin-Gay, Developmental Mathematics, 2e 88 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Example amount of discount original price discount rate amount of discount = 30% · $2000 The discount is $600. A $2000 designer dress is on sale for 30% off. Find the discount and the sale price. continued

9. Martin-Gay, Developmental Mathematics, 2e 99 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. continued sale pricediscountOriginal price sale price = $2000 − $600 The sale price is $1400. A $2000 designer dress is on sale for 30% off. Find the discount and the sale price.