1. Unit 3 Using Fractions and Percentages Presentation 1 Addition and Subtraction of Fractions Presentation 2 Multiplication and Division of Fractions Presentation 3 Compound Interest Presentation 4 Reverse Percentage Problem

2. Unit 3 Using Fractions and Percentages Addition and Subtraction of Fractions

3. When adding or subtracting fractions, you must have the same denominator. Example: (or ) Lowest common multiple of 4 and 5 is 20

4. When adding or subtracting fractions, you must have the same denominator. Example:

5. You have finished viewing the presentation Addition and Subtraction of Fractions Please choose an option Return to the Start Presentation 2 Multiplication and Division of Fractions Presentation 3 Compound Interest Presentation 4 Reverse Percentage Problem

6. Unit 3 Using Fractions and Percentages Multiplication and Division of Fractions

7. The rule is: Example: 3 is a common factor in both the numerator and denominator

8. The rule is: Example:

9. First Calculate Thus

10. You have finished viewing the presentation Multiplication and Division of Fractions Please choose an option Return to the Start Presentation 1 Addition and Subtraction of Fractions Presentation 3 Compound Interest Presentation 4 Reverse Percentage Problem

11. Unit 3 Using Fractions and Percentages Compound Interest

12. How much is $140 worth after 10 years in an account that pays 5% interest per year When A n is the total amount after investing A 0 for n years at r%

13. You have finished viewing the presentation Compound Interest Please choose an option Return to the Start Presentation 1 Addition and Subtraction of Fractions Presentation 2 Multiplication and Division of Fractions Presentation 4 Reverse Percentage Problem

14. Unit 3 Using Fractions and Percentages Reverse Percentage Problem

15. The price of a computer is $1398, including GCT at What was the price of the computer without GCT? To add 16.5% GCT, you multiply by 1.165 To remove GCT, you divide by 1.165 Computer price

16. You have finished viewing the presentation Reverse Percentage Problem Please choose an option Return to the Start Presentation 1 Addition and Subtraction of Fractions Presentation 2 Multiplication and Division of Fractions Presentation 3 Compound Interest