Ratios and Unit Rate

Mr. Wright has 7 boys and 9 girls. What is the ratio of girls to boys?

• 7 to 9
• 9 to 7

Your brother has a bag of marbles.  He has 8 green marbles, 3 blue marbles, 7 red marbles, and 2 yellow marbles.  What is the ratio of blue marbles to red marbles?

• 3 to 8
• 3 : 7
• 2 to 7
• 2 : 3

What is a Ratio?

• Is a comparison of two quantities 
• A rate with a denominator of one
• It is when the only factor the numerator and denominator share is a one 
• Two decimals that can be multiplied

An eight pack of juice boxes costs $4.79, and a 12 pack of juice boxes cost $6.59. Use this information to calculate the better buy.

• 8 pack
• 12 pack

What mathematical operation do ratios involve?

• addition
• subtraction
• multiplication
• division

Which of the following expresses a ratio?

• 2/3
• two-thirds
• 0.667
• 2.3

Simplify the ratio of
35 : 14

• 5 : 2
• 2 : 5
• 3 : 1
• 35: 14

Which ratio is written incorrectly?

• X : Y
• X and Y
• X/Y
• X to Y

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

Mrs. Edgar bought an eight pack of bottled water for $4.00.  What was the unit price for the water?

• $32.00
• $0.50
• $3.20
• $5.00