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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

Pre-algebra

Quiz 7B -Applications of Percent






15 = 85p

15 = 85p

85 85

.17647 = 17.6%


44 = 120p

44 = 120p

120 120

.3666 = 36.7%


62 - 44 36% of what number? = x

44 100

18 = x

44 100

1800 = 44 x

X = 40.9% increase

  • A price change from $44 to $62.


56 - 42 36% of what number? = x

56 100

14 = x

56 100

1400 = 56 x

X = 25% decrease

  • A price change from $56 to $42.


165 - 122 36% of what number? = x

165 100

43 = x

165 100

4300 = 165 x

X = 26.1% decrease

  • Weight change from 165 lbs to 122 lbs.


132 - 112 36% of what number? = x

112 100

20 = x

112 100

2000 = 112 x

X = 17.9% increase

  • Weight change from 112 lbs to 132 lbs.


X= 14,500(.06)

X = $870


X = 167500(.05)

X= $8,375


100 = .085x

X = $1,176.47


20.2 = 162.5x

X= .124307 = 12.4%


X = 44.5

78.5 100

100x = 3,493.25

X = 34.93

34.93+ 78.50

$113.43


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