1. What is a ratio, rate, and unit rate?
Essential Question
What is a ratio, rate, and unit rate?

2. Ratios A ratio is a comparison of two numbers by division.
To write ratios, use the word to, a colon, or a fraction bar.
EXAMPLE #1: John read 3 books in 4 days. Write the ratio of books to days.
Words: 3 to 4
Colon: 3:4
Fraction: 3/4

3. Ratios There are 5 boys and 6 girls in Grant School.
1. What is the ratio of girls to boys using a fraction?
2. What is the ratio of girls to children in Grant School (use a colon)?
6:11
3. What is the ratio of boys to children in Grant School (use words)?
5 to 11

4. Rates A rate is a ratio that is measured using two different units.
A unit rate is a rate per one given unit, like 6 miles per 1 hour.
Example:
You can travel 120 miles on 60 gallons of gas. What is your fuel efficiency in miles per gallon?
________
120 miles
________
20 miles
Rate = =
6 gallons
1 gallon
Your fuel efficiency is 20 miles per gallon.

5. You are shopping for t-shirts. Which store offers the better deal?
Examples
You are shopping for t-shirts. Which store offers the better deal?
Store A:$25 for 2 shirts Store B: $45 for 4 shirts Store C: $30 for 3 shirts
Write each ratio as a unit rate.
Store A: $𝟐𝟓 𝟐 𝒔𝒉𝒊𝒓𝒕𝒔 =
Store B: $𝟒𝟓 𝟒 𝒔𝒉𝒊𝒓𝒕𝒔 =
Store C: $𝟑𝟎 𝟑 𝒔𝒉𝒊𝒓𝒕𝒔 =

6. Examples Find each unit rate. 1. 300 miles in 5 hrs
2. $6.75 for 3 coloring books
miles using 3 gal of gas