Ratios and Proportions Big Ideas

The cookie jar has six chocolate chip cookies and five oatmeal cookies. What is the ratio of oatmeal to chocolate chip cookies?

• 6:5
• 5:6
• 6:11
• 6:11

Enter the missing numbers to create equivalent ratios. 
1 : 3
6 : 18
2 : _
4 : _

• 4 & 8
• 4 & 12
• 6 & 12
• 6 & 8

• 8

• 10

• 4

• 12

In my fish tank, the ratio of red fish to blue fish is 3:5. There are 20 blue fish. How many red fish are there?

• 18
• 12
• 4
• 15

Write the ratio as a fraction in simplest form. 
 
 24 players : 3 teams

• 8:3
• 8 to 1
• 8/1
• 8/3

Solve the proportion.

• k=5
• k=3.3333333
• k=60
• k=90

Solve the proportion.

• n=6
• n=24
• n=7
• n=8

If there are 5 boys and 7 girls, write the ratio of girls to boys.

• 5 to 7
• 7 to 5
• 5 to 12
• 7 to 12

A bag of marbles comes with 3 blue marbles, 2 red marbles, and 5 yellow marbles. What is the ratio of red to yellow?

• 2 to 5
• 5 to 3
• 3 to 5
• 5 to 2

What is a Ratio?

• Is a comparison of two quantities 
• To multiply two fractions 
• A number over another number
• Two decimals that can be multiplied