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Understanding and Solving Percent Problems: A Guide to Percentage Calculations

This guide provides essential keywords and techniques for solving percent problems. It covers key concepts such as understanding the meanings of "of" and "is" in relation to percentages, and how to convert between decimals and percentages. It demonstrates practical examples, including calculating what percent one number is of another, finding a specific percentage of a number, and solving for unknown values in percent equations. Learn how to move the decimal point effectively for accurate conversions and calculations.

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Understanding and Solving Percent Problems: A Guide to Percentage Calculations

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Presentation Transcript

  1. Section 3.7 Solve Percent Problems

  2. Key words for percent problems “OF”: Multiplication “IS”: Equals

  3. To turn a decimal into a percent, move the decimal place…… to the right two places To turn a percent into a decimal, move the decimal place…….. to the left two places

  4. Conversions 87 • .87=___% _____=74.2% .742

  5. What percent of 5 is 30? Now we have to move the decimal to make it a percentage

  6. What percent of 224 is 98? Now we have to move the decimal to make it a percentage

  7. What number is 75% of 164 We have to change the % to a decimal

  8. What percent of 76 is 57?

  9. What number is 35% of 80?

  10. 21 is 37.5% of what number?

  11. 27 is 25% of what number?

  12. 78 is 150% of what number?

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