Percent Change and 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 guessed that there were 256 gumballs in the jar. There were actually 510. Find your percent error. Round to the nearest tenth if necessary.

• 49.8%

• 49.9%

• 50.2%

• 50.3%

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

• 20%

• 18%

• 16%

• 17%

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

You guessed that the Chicago Cubs would win 95 games during the regular season. They actually won 103. What was your percent error? Round to the nearest tenth if necessary.

• 7.8%

• 7.7%

• 0.77%

• 0.78%

The student council estimated that they would have 250 people attend the homecoming dance. The number of people who attended was 315. What is the percent of error to the nearest hundredth percent? Type the answer in the blank up to the hundredth place value.

Mathematical Equivalence

ON

What is the percent change when a quantity increases from 100 to 150?

• 25%

• 50%

• 75%

• 100%