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Pre-algebra

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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  1. Pre-algebra Quiz 7B -Applications of Percent

  2. Write 12.5% as a decimal. .125

  3. Write 6.5% as a decimal. .065

  4. Translate the following sentence into an equation: 18 is 44% of what number? 18 = .44n

  5. Translate the following sentence into an equation: 104 is 36% of what number? 104 = .36n

  6. 15 is what percent of 85? 15 = 85p 15 = 85p 85 85 .17647 = 17.6%

  7. 44 is what percent of 120? 44 = 120p 44 = 120p 120 120 .3666 = 36.7%

  8. 62 - 44 = x 44 100 18 = x 44 100 1800 = 44 x X = 40.9% increase • A price change from $44 to $62.

  9. 56 - 42 = x 56 100 14 = x 56 100 1400 = 56 x X = 25% decrease • A price change from $56 to $42.

  10. 165 - 122 = x 165 100 43 = x 165 100 4300 = 165 x X = 26.1% decrease • Weight change from 165 lbs to 122 lbs.

  11. 132 - 112 = x 112 100 20 = x 112 100 2000 = 112 x X = 17.9% increase • Weight change from 112 lbs to 132 lbs.

  12. 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

  13. 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

  14. 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

  15. 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%

  16. 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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