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Percent Equations
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Percent Equations

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Percent Equations Percent Equations Presentation Transcript

  • Percent Equations
  • Solving Percent Equations
    • Three types of problems
      • What is 50% of 20?
      • 10 is 50% of what?
      • What percent of 20 is 10?
  • Solving Percent Equations
    • In an equation:
    • What do we represent the is with?
    • =
    • What do we represent the of with?
    • x
    • What do we represent the what with?
    • a variable
  • Solving Percent Equations
    • Simple equation that always works:
  • Solving Percent Equations
    • 15 is what percent of 12?
    • Cross multiply and divide to find the answer.
  • Solving Percent Equations
    • (15 x 100)/12 =
    • 125
  • Solving Percent Equations
    • What is 15% of 12?
    • Cross multiply and divide
  • Solving Percent Equations
    • (15 x 12)/100
    • 1.8
  • Solving Percent Equations
    • 12 is 15% of what?
    • Cross multiply and divide
  • Solving Percent Equations
    • (12x100)/15
    • 80
  • Solving Percent Equations
    • Practice:
    • What is 4% of 150?
    • What % of 51 is 17?
    • 6% of what is 36?
    • Answers:
    • 6
    • 33 1/3 %
    • 600