Percent and Percent of Change

Last week, you finished level 2 of a video game in 32 minutes. Today, you finished level 2 in 28 minutes. What is your percent of change?

• Increase 12.5%

• Decrease 12.5%

• Increase 4%

• Decrease 4%

Find the percent of change if the original cost was $5 and the new cost is $1. 

• Increase $4

• Decrease $4

• Decrease 80%

• Decrease 400%

Buying a birthday card, you think the price is $4.50, but the actual price is $4. What is the percent of error?

• 50%

• 0.5%

• 12.5%

• 0.125%

Mrs. Carmen's math class has 24 students, but she thought she only had 20 students. What is her percent of error?

• 4%

• 20%

• 17%

• 16 2/3%

Sam thinks the cost of the book is $50, but actually, it's $56. What is Sam's percent of error?

• 10%

• 20%

• 2%

• 8.3%

Mary thought the umbrella was selling for $60. When she checked out, it cost $50. What is her percent of error?

• 10%

• 20%

• 16 2/3%

• 8.3%

Renee thinks it will take 95 minutes to run 7 miles. She runs it in 80. What is her percent of error?

• 15%

• 15.79%

• 18.75%

• 8.42%

Andy thought he would receive $60 for his birthday, but he received $40 instead. What is his percent of error?

• 50%

• 20%

• 66 2/3%

• 150%

Isabella thinks there are 430 passengers, but there are 380. What is her percent of error?

• 13.16%

• 12.5%

• 11.63%

• 50%

Connie thinks she types 39 words/minute, but she types 56 words/minute. What is her percent of error?

• 17%

• 43.59%

• 69.64%

• 30.36%