Proportions and Ratio

Which is the better deal?
Doritos
$4.39 for 11.5 oz
OR
Cheetos
$2.24 for 9.75 oz

• Doritos

• Cheetos

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 it called when you set two ratios equal to each other?

• Proportion

• Fraction

• Ratio

• Congruent

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

Do the ratios form a proportion?

• Yes, they form a proportion.

• No, they do not form a proportion.

Patrick has 2 black, 3 red, and 5   white toy cars. What is the ratio of red toy cars to all the toy cars? 

• 3:5

• 1:3

• 3:11

• 3:10

I paid $15.00 for 6 gallons of gasoline.
What was the price PER gallon?

• $0.40

• $9.00

• $2.50

• $0.90

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

The Williams family bought four concert tickets for $252.  What was the price per ticket?

• $60.00

• $63.00

• $6.30

• $62.00

Which of the following shows the least expensive unit price? 

• 3 oranges for $1.02

• 4 oranges for $1.52 

• 5 oranges for $1.75

• 6 oranges for $2.46