Pre algebra
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Pre-algebra. Quiz 7B -Applications of Percent . Write 12.5% as a decimal. .125. Write 6.5% as a decimal. .065. Translate the following sentence into an equation: 18 is 44% of what number?. 18 = .44n. Translate the following sentence into an equation: 104 is 36% of what number?. 104 = .36n.

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Pre-algebra

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Pre algebra

Pre-algebra

Quiz 7B -Applications of Percent


Pre algebra

  • Write 12.5% as a decimal.

.125


Pre algebra

  • Write 6.5% as a decimal.

.065


Pre algebra

  • Translate the following sentence into an equation: 18 is 44% of what number?

18 = .44n


Pre algebra

  • Translate the following sentence into an equation: 104 is 36% of what number?

104 = .36n


Pre algebra

  • 15 is what percent of 85?

15 = 85p

15 = 85p

85 85

.17647 = 17.6%


Pre algebra

  • 44 is what percent of 120?

44 = 120p

44 = 120p

120 120

.3666 = 36.7%


Pre algebra

62 - 44 = x

44 100

18 = x

44 100

1800 = 44 x

X = 40.9% increase

  • A price change from $44 to $62.


Pre algebra

56 - 42 = x

56 100

14 = x

56 100

1400 = 56 x

X = 25% decrease

  • A price change from $56 to $42.


Pre algebra

165 - 122 = x

165 100

43 = x

165 100

4300 = 165 x

X = 26.1% decrease

  • Weight change from 165 lbs to 122 lbs.


Pre algebra

132 - 112 = x

112 100

20 = x

112 100

2000 = 112 x

X = 17.9% increase

  • Weight change from 112 lbs to 132 lbs.


Pre algebra

  • A car salesman was able to sell a car for $14,500. He earned 6% commission on the sale. How much was his commission?

X= 14,500(.06)

X = $870


Pre algebra

  • A relator was able to sell a house for $167,500. He earned 5% commission on the sale. How much was his commission?

X = 167500(.05)

X= $8,375


Pre algebra

  • Janet earns 8.5% commission on her clothing sales. If she wants to earn $100 commission, how much must she sell?

100 = .085x

X = $1,176.47


Pre algebra

  • Jack worked his first week at Hershey Park. He earned a total of $162.50. He was disappointed to see that $20.20 was withheld for taxes. What percent of his check was withheld?

20.2 = 162.5x

X= .124307 = 12.4%


Pre algebra

  • In 2002, the average monthly price for cell phone plans was $78.50. Because of data plans, the cost has increased 44.5% per month. What is the new average monthly cost?

X = 44.5

78.5 100

100x = 3,493.25

X = 34.93

34.93+ 78.50

$113.43


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