1. Warm up:Write each fraction in simplest form.
4/12
18/27
14/63
3/48

2. Vocabulary:
Percent: A fraction or ration in which the denominator is 100
Proportion: An equation which states that two ratios are equal.
Rate: A comparison of two quantities that have different units of measure
Ratio: compares quantities that share a fixed, multiplicative relationship.
Rational number: A number that can be written as a/b where a and b are integers, but b is not equal to 0.
Unit Ratio: are ratios written as some number to 1.
Quantity: is an amount that can be counted or measured.

3. 5 2 Fraction Words: 5 to 2 Symbols 5 : 2 What is a Ratio?
Comparing two numbers by division.
It can be written in three different ways:
Fraction
Words: 5 to 2 5
Symbols 5 : 2 2

4. Chex Mix Recipe (makes 6 cups) - 4 cups cereal, 2 cups pretzels, 1 cup M&M’s
Statement
Words
Symbols
Fractions
Cereal to pretzels
4 to 2
4:2
4/2
Cereal to Chex Mix
4:7
Pretzels to cereal
2 to 4
M&M’s to pretzels

5. Ex 1: 20 : 30 80 : 120 10 : 15 2 : 3 What are Equal Ratios?
When two ratios name the same number, they are equal. (Like an equivalent fraction.)
Ex 1:
20 : 30
Equal Ratios:
80 : 120
10 : 15
2 : 3

6. Ex 2:
10 : 35
Equal Ratios:
2 : 7
20 : 70

7. How can Ratios be written in Simplest Form?
Divide both terms in the ratio by their GCF.
Example: 12 to 8
3 to 2

8. Write each ratio in simplest form:
Ex 3: 4:20 1:5

9. Write each ratio in simplest form:
Ex 4: 10:1 THIS IS THE SIMPLEST FORM!

10. Homework Time