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## Unit 3 Using Fractions and Percentages

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**Unit 3Using Fractions and Percentages**Addition and Subtraction of Fractions**When adding or subtracting fractions, you must have the same**denominator. Example: Lowest common multiple of 4 and 5 is 20 (or )**When adding or subtracting fractions, you must have the same**denominator. Example:**You have finished viewing the presentationAddition and**Subtraction of FractionsPlease choose an option**Unit 3Using Fractions and Percentages**Multiplication and Division of Fractions**The rule is:**Example: 3 is a common factor in both the numerator and denominator**The rule is:**Example:**Example:**First Calculate Thus**You have finished viewing the presentationMultiplication and**Division of FractionsPlease choose an option**Unit 3Using Fractions and Percentages**Compound Interest**How much is $140 worth after 10 years in an account that**pays 5% interest per year When An is the total amount after investing A0 for n years at r%**You have finished viewing the presentationCompound**InterestPlease choose an option**Unit 3Using Fractions and Percentages**Reverse Percentage Problem**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**You have finished viewing the presentationReverse Percentage**ProblemPlease choose an option