Ratios and Equivalent Ratios

What is the ratio of bananas to apples?

• 2 : 14

• 2 to 7

• 5 : 7

• 7 to 2

• 

The ratio of red pens to blue pens in a package is 2:5. If there are 40 blue pens in the package, how many red pens are in the package?

What is a Ratio?

• A Denominator

• A comparison of two quantities

• A Mixed Number

• Order of Operations

• 

How many ways can you write a ratio?

• 1

• 2

• 3

• 4

• 

If the ratio of boys to girls in a class is 3:4, how many boys are there if there are 20 girls?

• 15

• 25

• 10

• 30

Match the equivalent ratios.

• 1:4

• 7:14

• 2:3

• 5:15

• 2:5

• 4:10

• 1:2

• 3:12

• 1:3

• 24:36

If the ratio of cats to dogs in a pet store is 3:4, how many cats are there if there are 20 dogs?

• 15

• 25

• 30

• 10

The ratio of blue cards to green cards is 2 to 5. An equivalent ratio to 2 to 5 would be ​ (a)   to ​ (b)   .

• 14

• 35

• 2

• 5

• 7

• 3

• 10

• 13

Review: Match the following:

• Rate

• A rate for one of something. $1 per candy bar.

• Ratio

• Two ratios that represent the same amount: 1/2 = 5/10

• Unit Rate

• Compares two numbers of different measures. 6 books in 3 days.

• Equivalent

• Compares two numbers: 1:2

• 4

• 6

• 8

• 10