Ratios Ratio – comparison of two quantities by division 5 7 5 to 7 5:7.

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Presentation transcript:

Ratios Ratio – comparison of two quantities by division 5 7 5 to 7 5:7

Equivalent Ratios – have the same value. 3 = 6 7 14 To find equivalent ratios, multiply or divide both terms of the ratio by the same number. 2 = 5 18 = 24

Simplifying Ratios 55 90 ˙⁄. 5 = 11 18 55 : 90 = 1 7/8 : 3 3/4

Unit Rates and Proportional Reasoning Rate – a ratio that compares two quantities measured in different units. Miles Gallon Miles Hour

Unit Rate – a rate of one unit of a given quantity. 15 grams fat Rate 5 servings 3 grams fat Unit Rate 1 serving

To find the unit rate (cost) of an item, simply divide. Unit Cost – unit rate that gives cost per unit Apple Juice $3.99 13.5 oz. To find the unit rate (cost) of an item, simply divide. $6.19 16 oz. Shampoo $3.05 48 oz. $3.59 64 oz.

Total Cost - Multiply You Buy five candy bars costing $1.10 each. How much is the total cost? $1.10(5) You buy three bags of chips costing $4.99 per bag. How much it the total cost? 3(4.99)

What is the unit rate for-- 326 miles 50 gallons 6.52 miles 1 gallon 96 baskets made 6 games 16 baskets 1 game $1.85 16 oz. $0.12 1 oz.