1. Using Ratio Tables (Part 1: Creating equivalent ratios by adding on)

2. Definition A ratio table is a tool used to organize equivalent ratios.

3. Example A You can walk 6 miles in 2 hours
Example A You can walk 6 miles in 2 hours. Make a table of equivalent ratios to show how far you can walk in 4 hours, 6 hours, 8 hours, and 10 hours.

4. Example A - ratio of 2 hours: 6 miles
Time in Hours
Distance in Miles

5. Example B
Juan can read 9 pages in his book in 10 minutes. Make a table of equivalent ratios to find how many pages he can read in 20 minutes, 30 minutes, 40 minutes, 50 minutes, and 60 minutes.

6. Example B – ratio 9 pages: 10 minutes
Number of Pages
Time (in minutes)

7. Using Ratio Tables (Part 2: Creating equivalent ratios by multiplying)

8. A party planner said that 3 pizzas will serve about 7 people.
Example
A party planner said that 3 pizzas will serve about 7 people.
How many pizzas are needed for 350 people?

9. Strategy #1
# of Pizzas
# of People 3 7

10. Strategy #1
# of Pizzas
# of People 3 7
300
700
× 100
× 100

11. # of Pizzas # of People 3 7 300 700 150 350 Strategy #1 × 100 × 100
÷ 2
÷ 2

12. Solution! # of Pizzas # of People 3 7 300 700 150 350 Strategy #1
× 100
× 100
÷ 2
÷ 2
Solution!

13. Strategy #2
# of Pizzas
# of People 3 7

14. Strategy #2
# of Pizzas
# of People 3 7 15 35
× 5
× 5

15. # of Pizzas # of People 3 7 15 35 150 350 Strategy #2 × 5 × 5 × 10

16. Solution! # of Pizzas # of People 3 7 15 35 150 350 Strategy #2 × 5
× 10
× 10
Solution!

17. Now it’s your turn. Use a ratio table to solve each problem
Now it’s your turn! Use a ratio table to solve each problem. Example #1: Six wheel rotations on a bike takes you 10 yards. How many wheel rotations will it take to go 45 yards?

18. Example #2: In a bag of blue and yellow candies, the ratio of blue candies to yellow candies is 3:5. If the bag contains 60 yellow candies, how many blue candies are there?

19. Example #3: James can send 12 text messages in 8 minutes
Example #3: James can send 12 text messages in 8 minutes. At this same rate, how long will it take James to send 75 text messages?

20. Example #4: At a local college, 2 out of every 8 seniors live in apartments. About how many of the 28 seniors are likely to live in apartments?

21. Example #5: In a class, the ratio of boys to girls is 3 to 4
Example #5: In a class, the ratio of boys to girls is 3 to 4. If there are 12 boys in the class, then how many girls are there?