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In the following exercises, convert each fraction to a percent.

According to the Centers for Disease Control, 2 5 of adults do not take a vitamin or supplement.

40%

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According to the Centers for Disease Control, among adults who do take a vitamin or supplement, 3 4 take a multivitamin.

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In the following exercises, translate and solve.

What number is 46% of 350 ?

161

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120% of 55 is what number?

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84 is 35% of what number?

240

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15 is 8% of what number?

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200% of what number is 50 ?

25

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7.9% of what number is $4.74 ?

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What percent of 120 is 81.6 ?

68%

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What percent of 340 is 595 ?

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Solve General Applications of Percents

In the following exercises, solve.

When Aurelio and his family ate dinner at a restaurant, the bill was $83.50 . Aurelio wants to leave 20% of the total bill as a tip. How much should the tip be?

$16.70

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One granola bar has 2 grams of fiber, which is 8% of the recommended daily amount. What is the total recommended daily amount of fiber?

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The nutrition label on a package of granola bars says that each granola bar has 190 calories, and 54 calories are from fat. What percent of the total calories is from fat?

28.4%

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Elsa gets paid $4,600 per month. Her car payment is $253 . What percent of her monthly pay goes to her car payment?

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In the following exercises, solve.

Jorge got a raise in his hourly pay, from $19.00 to $19.76 . Find the percent increase.

4%

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Last year Bernard bought a new car for $30,000 . This year the car is worth $24,000 . Find the percent decrease.

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Solve Sales Tax, Commission, and Discount Applications

In the following exercises, find

  1. the sales tax
  2. the total cost

The cost of a lawn mower was $750 . The sales tax rate is 6% of the purchase price.

  1. ⓐ $45
  2. ⓑ $795

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The cost of a water heater is $577 . The sales tax rate is 8.75% of the purchase price.

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In the following exercises, find the sales tax rate.

Andy bought a piano for $4,600 . The sales tax on the purchase was $333.50 .

7.25%

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Nahomi bought a purse for $200 . The sales tax on the purchase was $16.75 .

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In the following exercises, find the commission.

Ginny is a realtor. She receives 3% commission when she sells a house. How much commission will she receive for selling a house for $380,000 ?

$11,400

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Jackson receives 16.5% commission when he sells a dinette set. How much commission will he receive for selling a dinette set for $895 ?

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In the following exercises, find the rate of commission.

Ruben received $675 commission when he sold a $4,500 painting at the art gallery where he works. What was the rate of commission?

15%

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Tori received $80.75 for selling a $950 membership at her gym. What was her rate of commission?

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In the following exercises, find the sale price.

Aya bought a pair of shoes that was on sale for $30 off. The original price of the shoes was $75 .

$45

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Takwanna saw a cookware set she liked on sale for $145 off. The original price of the cookware was $312 .

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In the following exercises, find

  1. ⓐ the amount of discount and
  2. ⓑ the sale price.

Nga bought a microwave for her office. The microwave was discounted 30% from an original price of $84.90 .

  1. $25.47
  2. $59.43

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Jarrett bought a tie that was discounted 65% from an original price of $45 .

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Practice Key Terms 3

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Source:  OpenStax, Prealgebra. OpenStax CNX. Jul 15, 2016 Download for free at http://legacy.cnx.org/content/col11756/1.9
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