Ratio and Rates Unit Review

There are 4 cats and 7 dogs. Write a ratio of dogs to cats

• 4:7

• 7 to 4

• 8/14

• 4 to 7

Answer explanation

The order of the numbers must match the order of the words.

4 cats to 7 dogs. ratio of dogs to cats

7 to 4

There are 12 girls and 16 boys in a class. Write the ratio of girls to boys in simpliest form.

• 3:4

• 6:8

• 16:12

• 4:3

Answer explanation

Write the ratio of girls to boys

12/16

Divide both numbers by 4

3/4

Compare the two ratios 2:5 ___6:10

• >

• <

• =

Answer explanation

If you cross multiply

2x10=20

5x6= 30

20<30

OR

You can simplify the ratio 6/10

to 3/5

2/5 < 35

At a shelter, the ratio of cats to dogs is 5:3. If there are 25 cats, how many dogs are in the shelter?

Answer explanation

Ratio is 5/3 multiply both number by 5

5x5= 25 cats

5x3= 15 dogs

A 6-pack of soda costs $4.50. What is the cost per can?

• $0.75

• $1.33

• $27

• $2.50

Answer explanation

Unit rate- Total cost divided by how many items you have.

$4.50/6

A sporting goods company puts 75 golf balls equally into 15 boxes. How many golf fit into 4 boxes?

• 300

• 48

• 20

• 5

Answer explanation

First find out how many fit into 1 box: 75/15= 5

Now multiply the number of balls in one box by 4 boxes

5 x4 = 20

Cody paid $22 for 5 movie tickets. Kelli paid $28.50 for 6 movie tickets. Who paid less per ticket?

• Kelli

• Cody

• The paid the same amount

Answer explanation

Cody paid 22/5= $4.40

Kelli paid 24.50/6= 4.75

Cody paid less

A plane flew 100 miles in 20 minuts. What was the plane's rate speed in miles/min?

• 50 miles/min

• .20 miles/min

• 200 miles/min

• 5 miles/min

Answer explanation

100/20= 5

Alexa runs 7 miles in 56 minutes. At that pace, how long will it take her to run 10 miles?

• 80 minutes

• 8 minutes

• 1.25 hours

• 70 minutes

Answer explanation

Frist find the miles per minutes

56/7= 8 miles a minute

Then multipl the unit rate by number of miles

8 min/mile x 10 miles= 80 minutes

Cammy can bake 25 cupcakes in an hour. How many cupcakes can she bake in 5 hours?

• 5 cupcakes

• 100 cupcakes

• 125 cupcakes

• 30 cupcakes

Answer explanation

Multiply the rate by the time

25cupcakes/1 hour

25 x 5 hours= 125 cupcakes