D.1 and D.2 Ratio Tables and Unit Rates

What mathematical operation do ratios involve?

• addition
• subtraction
• multiplication
• division

When are ratios useful? Choose the best answer.

• When you want to subtract a number by another.
• When you want to multiply one number by another.
• When you want to compare a part to a whole.
• When you want to figure out the probability of a number.

Which of the following expresses a ratio?

• 2/3
• two-thirds
• 0.667
• 2.3

Which ratio is equivalent to 3/4?

• 4/3
• 3.4
• 0.75
• 6/8

Find the unit rate per ounce of a bag of Fritos that costs $2.29 for 9 ounces.

• $0.25
• $20.61
• $1.00
• $2.29

If there are 20 apples in the fridge and 9 on the table, what is the ratio of apples in the fridge to apples on the table?

• 9/20
• 20/9
• 9.20
• 20.9

If there are 24 peaches on a tree and 4 on the ground, what is the ratio of peaches on the ground to peaches on the tree?

• 24.4
• 4.24
• 24/4
• 4/24

If there are 24 peaches on the tree and 4 peaches on the ground, what is the ratio of peaches on the ground to total number of peaches?

• 4/24
• 4/28
• 24/4
• 28/4

Which is the better buy? a 12 pack of Coke for $3.50 or a six pack of Coke for $1.80?

• The 12 pack of Coke
• The 6 pack of Coke
• Neither
• They are the same

Express the ratio as a fraction in simplest form:
18 ounces to 3 cups

• 6 to 1
• 1/6
• 18/3
• 3/18