Module3
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This document discusses different strategies for solving percentage problems: the 10% rule, which involves moving the decimal place left one spot to find 10% of a number; percent proportion, which sets up a fraction to solve for a percentage amount; percent equation, which uses the percentage, whole, and part in an equation; percent of change equation, which calculates change as new amount minus old amount divided by the old amount; and tic-tac-toe table, which lays out the whole, change, percentage, and result in a table. Examples are provided for each strategy to demonstrate how to use them to solve percentage problems.
Module3
- 1. Types of Strategies to Solve Percentage Problems By: Kari Knisely
- 2. What you will learn… When and how to use the following strategies: 10% Rule Percent Proportion Percent Equation Percent of Change Equation Tic-Tac-Toe Table
- 3. What you will need… Take notes as needed in order to familiarize yourself with the strategies presented. Pencil Paper
- 4. 10% Rule Great way to estimate any percentage problem
- 5. 10% Rule Move the decimal 1 place to the left 10% of 40 = 4.0 10% of 32.6 = 3.26 10% of 2 = .2 10% of 5,345 = 534.5
- 6. 10% Rule – Example 1 40% of 25 = ? 10% of 25 = 2.5 10% of 25 = 2.5 10% of 25 = 2.5 10% of 25 = 2.5 40% of 25 = 10.0
- 7. 10% Rule –Example 2 30% of 30 = ? 10% of 30 = 3.0 10% of 30 = 3.0 10% of 30 = 3.0 30% of 30 = 9.0
- 8. 10% Rule –Example 3 30% of 30 = ? 10% of 30 = 3.0 10% of 30 = 3.0 10% of 30 = 3.0 30% of 30 = 9.0
- 9. Percent Proportion Non Percentage Part = % Percentage Amount Amount Whole 100 is % = 100 Non Percentage Percentage Amount of Amount
- 10. Percent Proportion – Example 1 Non Percentage Part = % Percentage Amount Amount Whole 100 is % = 100 Non Percentage Percentage Amount of Amount
- 11. Percent Proportion – Example 2 Non Percentage Part = % Percentage Amount Amount Whole 100 is % = 100 Non Percentage Percentage Amount of Amount
- 12. Percent Proportion – Example 3 Non Percentage Part = % Percentage Amount Amount Whole 100 is % = 100 Non Percentage Percentage Amount of Amount
- 13. Percent Equation % Whole = Part
- 14. Percent Equation – Example 1 % Whole = Part
- 15. Percent Equation – Example 2 % Whole = Part
- 16. Percent Equation – Example 3 % Whole = Part
- 17. Percent of Change Equation – Example 1 New – Old = Percent of Change Old
- 18. Tic-Tac-Toe Whole/Original Start Amount 100 Change (+ or -) % + or - Part of Original Amount % End
- 19. Tic-Tac-Toe – Example 1 Whole/Original Start Amount 100 Change (+ or -) % + or - Part of Original Amount % End
- 20. What you learned… When and how to use the following strategies: 10% Rule Percent Proportion Percent Equation Percent of Change Equation Tic-Tac-Toe Table
- 21. Works Cited All images retrieved from Google images