Percent change/error

Mary currently weighs 150 pounds. Before her diet she, weighed 180 pounds. What is the percent of change in her weight?

• 17% Decrease
• 17% Increase
• 20% Increase
• 20% Decrease

A school's population increased from 1250 to 2000 students. What was the percent of increase?

• .375%
• .6%
• 37.5%
• 60%

Last week, the price of American cheese was $5 per pound. This week, it costs $6 per pound. What is the percent change? 

• Increase 20%
• Decrease 20%
• Increase $1
• Decrease $1

An online auction started the bid on an item at $20. The item sold for $50. What was the percent increase to the nearest percent?

• 150%
• 15%
• 60%
• 17%

You estimate that you sent 135 texts last week, but when you get the bill it was actually 108. What was your percent error?

• 20%
• 25%
• -20%
• -25%

You estimate that 200 people attend a school concert. The actual attendance was 240.   What is the percent error?

• 20%
• -20%
• -16.7%
• 16.7%

In 1999, the price of unleaded fuel was $1.09.  In 2015, the price of unleaded fuel is $1.89. What is the percent change?

• 173% increase
• 73% increase
• 73% decrease
• 27% increase

The first marking period, Ricky scored an 80 in math. The second marking period, Ricky's grade was an 86. What was the percent change?

• 7.5% increase
• 7.5% decrease
• 7% increase
• 7% decrease

An archaeologist estimated that a fossil was 520 years old. It was actually 500 years old. What was the percent error?

• 4%
• 20%
• 3.8%
• none of these

Mr. Nacerino estimates that it will take him 48 minutes to run 8 miles. It actually takes him 60 minutes. What was his percent error?

• 20%
• 12%
• 25%
• 8%