1. Chapter 10 L10-1 Notes: Ratios

2. Vocabulary A ratio is a comparison of two numbers by division.

3. Vocabulary A common way to express a ratio is as a fraction in simplest form also known as an equivalent ratio.

4. Write a RATIO in Simplest Form Write the ratio that compares the number of footballs to the number of tennis balls.

5. On Your Own… Write each ratio as a fraction in simplest form. 1. 3 drums to 18 trumpets 2. 8 gerbils to 36 pets

6. Vocabulary A rate is a ratio of two measurements having different kinds of units. A unit rate is a rate simplified to have a denominator of 1.

7. On Your Own… Write each ratio as a unit rate. 1. $9 for 3 cases of soda 2. 25 meters in 2 seconds

8. Chapter 10 L10-2 Notes: Solving Proportions

9. Vocabulary Proportion is an equation that shows that two ratios are equivalent. For two ratios to form a proportion, their cross products must be equal.

10. Solve a Proportion When one value in a proportion is unknown, you can use cross products to solve the proportion. 1.

11. Solve a Proportion 2.

12. On Your Own.. Solve each proportion. 1. 2. 3.