1. Objective: Learn to identify, write, and compare ratios and rates.

2. Ratio
What is a Ratio?
A ratio is a comparison of two quantities(numbers) using division
Three Ways to Write a Ratio
Fraction
With “to”
With “:”

3. Remember!
A fraction is in simplest form when the GCF (greatest common factor) of the numerator and denominator is 1. Example:

4. Try This! Cups chocolate chips to cups of cream
A recipe for homemade ice cream calls for 6 cups of cream, 1 cup of sugar, and 2 cups of chocolate chips. Write each ratio in all three forms.
Cups chocolate chips to cups of cream
Cups of sugar to total cups of ice cream
For every 2 cups of chocolate chips there are 6 cups of cream
Simplify
Find total number of cups

5. Writing Ratios
Suppose Ms. McLamb drove 75 miles in 3 hours. Write the ratio of miles to hours in fraction form.
This is a rate.

6. Example 1:
20 students are asked to choose their favorite music genre. 8 chose pop, 7 chose hip-hop, and 5 chose rock. Write the ratios in all three forms.
Rock to Hip-hop
Rock to Pop and Hip-hop

7. Example 2:
On average most people can read about 600 words in 3 minutes. Write the ratio of words to minutes in simplest form.

8. Example 3:
Honey lemon cough drops come in packages of 30 drops per 10 oz bag. Cherry cough drops come in packages of 24 drops per 6 oz bag. Which package has the greater ratio of drops to oz?