Proportionality and Percentages

What percent of 50 is 20?

• 40%
• 25%
• 2.5%
• 4%

78 is what percent of 450?

• 5%
• 10%
• 17.33%
• 18%

What is 40% of 230?

• 92
• 9200
• 9.20
• 575

What percent of 40 is 20?

• 50%
• 25%
• 2.5%
• 4%

The movie theater has 250 seats. 200 seats were sold for the current showing. What percent of seats are empty?

• 10%
• 20%
• 80%
• 90%

A survey of 1,000 people was done by the New York Times. 80% of the people did NOT know the name of their representative in Congress. How many of the 1,000 people knew the name of the Congressman?

• 200
• 400
• 600
• 800

Bill is in a class of 15 boys and 35 girls. 40% of the students in the class take the bus to school. How many students do take the bus to school?

• 15
• 20
• 30
• 35

In Ms. DLP's 8th period class there is a ratio of 8 girls to 10 boys. What percent are girls?

• 8%
• 44.44%
• 10%
• 18%

There are 28 students in class. 75% of them took the bus to school. How many students took the bus to school?

• 21 students
• 2.1 students
• 75 students
• 28 students

There are 28 students in class. 7 students wear glasses. What percent of the students in class wear glasses?

• 7
• 7%
• 25%
• 196%