Unit Rate

A rate is a ratio with two different units

Examples: Speed is a rate. We compare distance to time

350 miles in 3 hours

You may also see rates at the grocery store

A unit rate is a rate with a denominator of 1

For speed, a unit rate would be 25 miles to 1 hour

When we talk about unit rates, we see the word "per"

If we are talking about how much something costs, we call it unit price

We use the given rate to set up equivalent ratios, with a denominator of 1

For example, if a student reads book that is 320 pages long in 8 days, and we want to know how many pages they read PER day, we set up our rates like this:

We would divide the top and bottom by the same number (8) to find out how many pages are read in 1 day

So, let's get to our notes!