A ratio compares two different quantities.

For example, those two quantities could be monkeys and bananas:

Notice that there are $\blueD4$ monkeys and $\goldD5$ bananas.

Here are a few different ways we can describe

**the ratio of monkeys to bananas**:- There are $\blueD4$ monkeys for every $\goldD5$ bananas.
- The ratio of monkeys to bananas is $\blueD4$ to $\goldD5$.
- The ratio of monkeys to bananas is $\blueD4 : \goldD5$.

Order matters in ratios. Here are a few different ways to describe

**the ratio of bananas to monkeys**:- There are $\goldD5$ bananas for every $\blueD4$ monkeys .
- The ratio of bananas to monkeys is $\goldD5$ to $\blueD4$.
- The ratio of bananas to monkeys is $\goldD5 : \blueD4$.