Percent Proportions

A percent is...

• a number out of 100

• an equation of equivalent ratios

• a number that divides evenly into another number

A proportion is..

• a number out of 100

• an equation of equivalent ratios

• a number that divides evenly into another number

• this is not the right way to set it up

• a way to solve percent problems

What is 40% of 230?

• 92
• 9200
• 9.20
• 575

50 is what percent of 20?

• 40%

• 25%

• 2.5%

• 4%

78 is what percent of 450?

• 5%
• .17
• 17%
• 18%

18 is 40% of what number?

• 45
• 18
• 7.2
• 40

What is 20% of 45?

• 9
• 44.44
• 225
• 12

What is 15% of 60?

• 9
• 10
• 8
• 15

20 is 80% of what number?

• 25
• 24
• 26
• 20