Ratios Rates and Proportions

Jada can read 3/5 of a book in 1/4 of an hour.  How long would it take her to read one whole book?

• 2 and 2/5 books per hour

• 2 and 2/5 hours per book

• 5/12 of an hour per book

• 5/12 of a book per hour

In an animal shelter, the ratio of dogs to cats is 5 to 3. There are 25 dogs.  Write and solve a proportion to find the number c of cats.

• c=15

• c=18

• c=21

• c=16

Solve for x 

• x = 15

• x = 11

• x = 1/11

• x = 20

What is a better value for cheese?

• Kraft , because it's $2.29 per oz

• Simple, because it's $1.88 per oz

• Kraft, because it's $0.44 per oz

• Simple, because it's $0.53 per oz

In the fruit bowl there are 4 apples, 2 bananas, and 5 pears.  What is the ratio of pears to ALL fruit?

• 5:4

• 5:11

• 2:5

• 6:5

Solve the proportion.

• k=5

• k=3.3333333

• k=60

• k=90

John can read 135 pages in 1 1/2 hours. What is Johns reading rate in pages per minute?

• 2.5

• 1.5

• 90

• 30

A package of 36 photographs cost $18. What is the cost of each photograph?

• $2

• $0.50

A recipe requires 2 cups of milk for every 3 cups of flour. If you use 8 cups of milk, how many cups of flour do you need?

• 9

• 12

• 16

• 6

In a class, the ratio of boys to girls is 6:5. If there are 18 boys, how many girls are there?

• 11

• 24

• 12

• 15