Activities

1. Show 3 different ways to write a ratio to describe the following situation:  For every 5 people that take the bus to work 8 people drive a car.

2. Use the picture below to answer the following questions:

   

a. What is the ratio of stars to triangles?
b. What is the ratio of triangles to all the shapes?

3. Write the ratio of red to green and explain what it means in terms of this chart.

4. What does the ratio of 12:48 mean in relation to the chart?

5. In a classroom, 15 out of the 27 students are girls. What would the ratio 12:15 represent? Explain your work.

6. The ratio of basketball players to soccer players at a school is 15:20.  Are there more students that play basketball or soccer? Explain your work.

Answer Key/Rubric

1. 5 to 8; 5:8; 5/8

2. Answers may be given in any of the three forms:

a. 3:2
b. 2:5 

3. 15:9 (any form is acceptable)

       Acceptable meanings may include, but are not limited to:

• This is the ratio of the first grade students that picked red to the first grade students that picked green
• For every 15 students who pick red, 9 students will pick green

4. Acceptable responses may include, but are not limited to:

• It is the ratio of students that picked pink compared to the whole class of first grade students.
• Twelve for every 48 first grade students will pick pink.

5. The ratio of boys and girls

       Answers might include, but are not limited to:

• 12 is the number of boys and 15 is the number of girls so when you add them it gives you the total number of students in the class.
• 27 is the total and when you subtract 15 the number of girls you get 12.  That must be the number of boys in the class.

6. More students play soccer. 

       Reasons why might include, but are not limited to:

• The order of the numbers in a ratio corresponds to a given situation. 
• This ratio asks for the number of basketball players first and soccer players second.
• The second value in this ratio is the soccer players and also is the larger number.