Unit Rate

Unit Rates

What is a 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

Open Ended

Think of an example of a rate you may have seen before and share it!

Okay, so what is a unit rate?

• 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

How do we find unit rates?

• 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:

   $\frac{pages}{days\ }\ \frac{320}{8}=\ \frac{?}{1}$  

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

This will make more sense as we work through examples!

• So, let's get to our notes!