Proportion Quiz

What percent of 48 is 12?

21 is 12% of what number?

A cake recipe calls for 1.5 cups of milk and 3 cups of flour. Seth made a mistake and used 5 cups of flour. How many cups of milk should he use to keep the proportions correct?

• 2.5 cups milk

• 1.75 cups milk

• 2 cups flour

• 2.25 cups milk

Do the ratios form a proportion? Simplify each one to see if they are equal!

• Yes, they form a proportion.

• No, they do not form a proportion.

Solve the proportion.

• 9

• 90

• 900

• 25

Solve the proportion for r.

• 2.5

• 1

• 3.25

• -2.25

Hamburger sells 3 pounds for $6. If Alicia buys 10 pounds of hamburger, how much will she pay?

• $30

• $20

• $60

• $10

There were 5 ice cream cones for every 3 brownies sold at the ice cream shop. If there were 24 brownies sold, how many ice cream cones were sold?

• 8

• 15

• 40

• 29

The ratio of boys to girls in history class is 4 to 5. How many girls are in the class if there are 12 boys in the class?

• 12 girls

• 15 girls

• 5.3 girls

• 27 girls

A factory produces 6 motorcycles in 9 hours. Determine how many hours it takes to produce 16 motorcycles at this rate.

• 2.6 hours

• 27 hours

• 24 hours

• 26 hours