1. Writing Ratios (Practice)

2. Billy wanted to write a ratio of the number of white bunnies to the number of brown bunnies in the picture. He wrote 1: 3. Did Billy write the ratio correctly? Explain your answer.

3. In a classroom, there are 12 girls and 14 boys. a. What is the ratio of girls to boys? b. What is the ratio of girls to all of the students in the classroom?

4. Goal Problems

5. Which pictures show the same ratio of trucks to boxes?

6. Using Ratio Tables (Part 1)

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

8. 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.

9. Example A Time in Hours Distance in Miles

10. Using Ratio Tables (Part 2)

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

12. # of Pizzas# of People 37 Strategy #1

13. # of Pizzas# of People 37 300700 × 100 Strategy #1 × 100

14. # of Pizzas# of People 37 300700 150350 × 100 ÷ 2 Strategy #1 × 100

15. # of Pizzas# of People 37 300700 150350 × 100 ÷ 2 Solution! Strategy #1 ÷ 2 × 100

16. # of Pizzas# of People 37 Strategy #2

17. # of Pizzas# of People 37 1535 × 5 Strategy #2

18. # of Pizzas# of People 37 1535 150350 × 5 × 10 Strategy #2 × 5 × 10

19. # of Pizzas# of People 37 1535 150350 × 5 × 10 Solution! Strategy #2 × 5 × 10

20. 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?

21. 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?

22. 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?

23. Example #4: It takes Hans 6 hours to read 480 pages. Today, he is going to read for 5 hours. How many pages will he read? Fill out the table below to figure out how many pages Hans will read. Hours 126 Pages Read 240480

24. Example #5: At a local college, 5 out of every 8 seniors live in apartments. About how many of the 28 seniors are likely to live in apartments?

25. Example #6: A school has 300 students. If the ratio of boys to girls is 31 to 44, how many more girls are there in the school compared to boys?

26. Example #7: A person who weighs 160 pounds on Earth weighs 416 pounds on Jupiter. How much will a person weigh on Jupiter who weighs 120 pounds on Earth?