The directions are: Write each ratio as a unit rate.

What is a unit rate?

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A unit rate is a rate that compares two quantities where the second quantity is equal to 1 unit. In other words, it shows the amount of the first quantity per 1 unit of the second quantity. Unit rates are often used to compare prices, speeds, distances, and other measurements to simplify comparisons and calculations.

For example, if you have a ratio of 60 miles : 2 hours, the unit rate would be 60 miles per 1 hour. This means that you are traveling at a rate of 60 miles for every 1 hour.

To write a ratio as a unit rate, you divide both quantities in the ratio by the second quantity (which is typically the denominator). This will result in the first quantity being expressed per 1 unit of the second quantity.

Let's take an example to make it clearer:

Ratio: 80 miles : 4 hours

To find the unit rate, divide both quantities by the second quantity (in this case, 4 hours):

Unit rate = 80 miles / 4 hours = 20 miles per hour

So the unit rate is 20 miles per hour, which means you're traveling at a rate of 20 miles for every 1 hour.