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2. Sales tax is an amount added to the price of an item. sales tax = price sales tax rate total cost = price + sales tax Sales tax A tip is an amount added to a bill for service. tip = bill tip rate total cost = bill + tip Tips A discount is an amount that is subtracted from the regular price of an item. discount = price discount rate total cost = price – discount Discounts Common Uses of Percents VOCABULARY

3. Example 1: Finding Discounts A clothing store is having a 10% off sale. If Angela wants to buy a sweater whose regular price is $19.95, about how much will she pay for the sweater after the discount?

4. Example 2 A fishing store is having a 10% off sale. If Gerald wants to buy a fishing pole whose regular price is $39.95, about how much will he pay for the pole after the discount?

5. When estimating percents, use percents that you can calculate mentally. You can find 10% of a number by moving the decimal point one place to the left. You can find 1% of a number by moving the decimal point two places to the left. You can find 5% of a number by finding one- half of 10% of the number. F.Y.I.

6. Example 3: Finding Tips Ben’s dinner bill is $7.85. He wants to leave a tip that is 15% of the bill. About how much should his tip be?

7. Example 4 Fran’s breakfast bill is $13.95. She wants to leave a tip that is 20% of the bill. About how much should her tip be?

8. Example 5: Finding Sales Tax Ann is buying a dog bed for $29.75. The sales tax rate is 7%. About how much will the total cost of the dog bed be?

9. Example 6 Erik is buying a blanket for $19.83. The sales tax rate is 8%. About how much will the total cost of the blanket be?

10. Example 7 Diana is buying a rice cooker for $39.95. The sales tax rate is 8%. About how much will the total cost of the rice cooker be?