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

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

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

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

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

6. 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.

7. 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)

8. 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.