1. Writing and Solving Proportions

2. Proportions Proportion is an equation stating that two ratios are equivalent. Proportional are two quantities that form a proportion.

3. Writing Proportions You can write proportions in three different ways: 1.Using a table 2.Using columns 3.Using rows

4. Example:

5. Cross Product

6. Cross Products Property The cross products of a proportion are equal.

7. Practice

9. You read the first 20 pages of a book in 25 minutes. You read 36 pages in 45 minutes. Is the number of pages read proportional to your time?