# Ratios and Rates

This week we will begin unit 3. We are learning that a ratio is a comparison or relationship between two numbers with division. Ratios look like fractions. Rates are ratios in which the two numbers have different units. When we express a rate with a denominator of one, the rate is also called a unit rate. For example, we use unit rates tell us a cost per item at the store or miles per hour of a road trip. Here are some resources we will use in class: