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Percents and Total Cost

Percents and Total Cost. We often have to add or subtract percentages to find the total cost. Examples of percents that add to the cost Tip, or gratuity Tax Interest Mark-up. Examples of percents that subtract from the cost Discount Coupon Sale Mark-down.

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Percents and Total Cost

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  1. Percents and Total Cost

  2. We often have to add or subtract percentagesto find the total cost. • Examples of percents that add to the cost • Tip, or gratuity • Tax • Interest • Mark-up • Examples of percents that subtract from the cost • Discount • Coupon • Sale • Mark-down

  3. Ex 1) A new soccer ball is priced at $37. If the sales tax is 8%, what is the total cost to buy the soccer ball? Total cost = price + tax Find the tax. Add the price and the tax to find the total cost. Total cost = $37 + $2.96 Total cost = $39.96 The soccer ball costs $39.96 including tax.

  4. Ex 2) A movie ticket is regularly priced at $9.50. Every Tuesday, the movie theater offers a 20% discount on tickets purchased for the evening movies. If you use this discount, what is the sale price of a movie ticket? Sale price = price - discount Find the discount. Sale price = $9.50 - $1.90 Subtract the discount from the regular price to find the sale price. Sale price = $7.60 The sale price of a movie ticket is $7.60.

  5. Ex 3) The bill for lunch was $28, and Paul left a 15% tip. How much was the total cost including the tip? Total cost = bill + tip Find the tip. Add the bill and the tip to find the total cost. Total cost = $28 + $4.20 Total cost = $32.20 The total cost was $32.20 including the tip.

  6. Ex 4) The Moore family wants to buy a new computer regularly priced at $1,049. Mrs. Moore has a coupon for 20% off any item in the store. How much will the computer cost if they use the coupon? Sale price = price – coupon savings Find the coupon savings. Subtract the coupon savings from the regular price to find the sale price. Sale price = $1,049 - $209.80 Sale price = $839.20 The price of the computer with the coupon is $839.20.

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