Percent Proportions and Percent Change and Error

Which of these proportional equations would you use to find the missing pieces of a percent problem, using the words "Part and Whole"?

• 
• 
• 
• 

Calculate the percent increase. Round to the nearest percent. Original: 74 New: 85

• 0.15%

• 0.13%

• 13%

• 15%

Calculate the percent increase. Round to the nearest percent.

Original: 45

New: 92

• 51%

• 1.04%

• 104%

• .51

What number is 40% of 80?

• 30

• 32

• 320

• 40

42 is 25% of what number?

• 10.5

• 60

• 168

• 16.8

16 is what percent of 80?

• 20%

• 200%

• 128%

• 12.8%

Of the 160 7th graders at CMS, 96 donate canned goods to the food drive. What percent of the 7th graders donated food?

• 60%

• 66%

• 96%

• 99%

What number is 17% of 50?

12 is 40% of what number?

88 is what percent of 160?