## Overview of Equivalent Ratios

## Formative Assessment

# Summary of the Math: Overview of Equivalent Ratios

**Read and Discuss**

- A ratio is often represented as a pair of numbers, either in colon notation (280:210 or 4:3) or as a fraction $(\frac{280}{210}=\frac{4}{3})$.
- You can determine whether two ratios are equivalent in the following way:

The ratios 2:3 and 4:6 are equivalent if $\frac{2}{3}=\frac{4}{6}$. - You can represent equivalent ratios using a double number line. A double number line shows the relationship between two quantities by lining up the quantities at the same tick marks. Each of these pairs of numbers represents a ratio, and all of the ratios on a given double number line are equivalent; that is, the ratios all have the same value.

Can you:

- Find equivalent ratios?
- Represent equivalent ratios on a double number line?