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Applying Percents

Applying Percents. #23. Common Uses of Percents. Discounts. A discount is an amount that is subtracted from the regular price of an item. discount = price • discount rate total cost = price – discount. Tips. A tip is an amount added to a bill for service.

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Applying Percents

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  1. Applying Percents #23

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

  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?

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