Review: Ratios and Proportions

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

Josh bought a pizza with eight slices of pizza for $12. What is the cost of a slice of pizza?

• $12
• $1.50
• $3
• $1

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

What is the ratio to the picture shown, triangles to squares?

• 2:6
• 5:6
• 3:4
• 4:3

If there are 5 soccer players, 10 baseball players, and 15 basketball players, what is the ratio of baseball players to soccer players?

• 1 to 2
• 1 to 3
• 2 to 1
• 3 to 1

Solve the proportion.

• 1
• 3
• 6
• 5

Which relationship describes 2:5

• The ratio of desks to chairs if there are 5 chairs and 2 desk
• The ratio of boys to girls if there are 2 girls and 5 boys
• The ratio of girls to boys if ther are 2 girls and 5 boys
• The ratio of chairs to desk if there are 5 chairs and 2 desk

There is a ratio of 5 boys to 11 girls in our class. What is the total number of students if there are 6 boys?

• 26

• 18

• 11

200 children attended the school play. Of the total attendance, 40% were boys. How many girls attended the school play?

• 800
• 180
• 80
• 120

10 students want hotdogs for lunch and 26 want hamburgers.  What is the ratio of the number of students who want hot dogs to the number of students who want hamburgers?

• 26:10
• 10:26
• 10:36
• 25:36