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# Percent Equations

## on Oct 25, 2007

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## Percent EquationsPresentation 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?