Solve Percent Problems Using Proportions

Write a proportion to find how many points a student needs to score on a test in order to get the given percent:

The test is worth 12 points.

The test score is 75%.

• p/12=100/75

• p/100=12/75

• p/12=75/100

• p/75=12/100

• none of these

Write a proportion to find how many points a student needs to score on a test in order to get the given percent:

The test is worth 60 points.

The test score is 50%.

• p/100=50/60

• p/50=60/100

• p/60=100/50

• p/60=50/100

• none of these

Which proportion would allow you to solve for the missing side, x?

• A

• B

• C

• D

Solve the proportion:

• 4
• 8
• 14
• 10

Solve the proportion.

• p=31.3
• p=308
• p=924
• p=532

• 2.5
• 1
• 3.25
• -2.25

What percent of 50 is 20?

• 40%
• 25%
• 2.5%
• 4%

78 is what percent of 450?

• 5%
• .17
• 17%
• 18%

What is 40% of 230?

• 92
• 9200
• 9.20
• 575

The movie theater has 250 seats. 225 seats were sold for the current showing. What percent of seats are empty?

• 10%
• 20%
• 80%
• 90%