Ratios, Unit Rates and Rate Review

Ratios

Practice

• Question #1

Fill in the Blank

What is the ratio of circles to stars? Use the ratio symbol ( : ) in your answer.

:

Question #2

Fill in the Blank

What is the ratio of birds to fish? Use the ratio symbol ( : ) in your answer.

:

Question #3

Multiple Select

If there are 7 girls and 8 boys on the school’s track team, what is the ratio of girls to boys? Write your answer in three different ways.

• 7:8

• 8:7

• 8 to 7

• 7 to 8

• $$\frac{7}{8}$$

Unit Rate/Unit Cost Review

​90 miles in 5 hours

A rate compares two quantities with different units.

Driving 120 miles in 2 hours

​

The units are miles & hours

​

​Examples: Miles per hour, cups per recipe, cost for one, dollars per hour

Multiple Choice

What is the unit cost for 7 candy bars for $5.25?

• 0.75

• 1.75

• 0.50

• 75

Multiple Choice

14 shirts for $375.20

We need to find the COST per SHIRT

• 0.37

• 2.68

• 26.80

• 28.60

A unit rate is a rate that is simplified so that it has a denominator of 1 unit.

Example: Driving 60 miles in 1 hour or

60 miles/1 hour

​REMEMBER:

Multiple Choice

You drove 440 miles in 8 hours. How many miles per hour did you drive?

• 65 mph

• 50 mph

• 55 mph

• 18 mph

Multiple Choice

You earn $117 for working 12 hours. How much do you earn per hour?

• 10.20

• 9.75

• 14.50

• 11.00

Multiple Choice

Which is an example of a unit rate?

• 70 miles/2 hours

• 100 miles/3 hours

• 35 miles/1 hour

REMEMBER:

To get the unit rate, divide the numerator by the denominator.

​

Multiple Choice

A rate is a ratio that compares

• A part to a part

• A part to a whole

• Quantities with different units

• Quantities with the same units

Multiple Choice

A unit rate is a rate in which the unit in the denominator is:

• 0

• 3

• 1

• 2

Multiple Choice

Keith bought 4 shirts for $36. At this rate, what would his cost be for 7 shirts?

• $63.00
• $53.00
• $43.00
• $73.00

Multiple Choice

If 3 pounds of apples costs $0.90, how much will 10 pounds cost?

• $3.00
• $2.50
• $3.50
• $2.25