1. Warm-up Among the staff at Roosevelt Elementary, 68 teachers prefer coffee and 20 prefer tea. Which ratio shows the relationship of coffee drinkers to tea drinkers in simplest form? A. 10:34 B. 17:5 C. 5:17 D. 34:10

2. Unit Rates

3. Rates A ratio that compares two quantities with different kinds of units is called a rate. For example: The units words and minutes are different.

4. Unit Rates When a rate is simplified so that it has a denominator of 1 unit, it is called a unit rate. For example: The denominator is 1 unit. The rate on the left can be read as 50 words per minute.

5. Find the unit rate. READING Julia read 52 pages in 2 hours. What is the average number of pages she read per hour?

6. Find the unit rate. 16 laps in 4 minutes

7. Find the unit rate. SODA Find the unit price per can if it costs $3 for 6 cans of soda. Round to the nearest hundredth if necessary.

8. Find the unit rate. $3 for one dozen cookies

9. Find the unit rate. The costs of 4 different sizes of orange juice are shown in the table. Which container costs the least per ounce? A 96-oz container B 64-oz container C 32-oz container D 16-oz container

10. Find the unit rate. Sarah can paint 21 beads in 7 minutes. At this rate, how many beads can she paint in one hour?

11. An assistant cook peeled 18 potatoes in 6 minutes. At this rate, how many potatoes can he peel in 50 minutes? Find the unit rate.

12. Remember: To find the unit rate of any given ratio, simplify the fraction to a denominator of 1.