Percent Change/Error

A town’s population of children increased from 376 to 421 during the past year. Which equation shows how to find the percent increase?

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The value of an autographed baseball card increased from $39 to $65. What is the percent increase in value of the baseball card?

• 40%

• 66.7%

• 60%

• 160%

A zookeeper predicted that the weight of a newborn lion would be 2.8 pounds. When the zoo’s lion gave birth, the newborn weighed 3.5 pounds. What is the zookeeper’s percent error?

• 28%

• 20%

• 30%

• 25%

If the original quantity is 15 and the new quantity is 19, which is the best ESTIMATE for the percent change?

• 25% decrease

• 5% decrease

• 5% increase

• 25% increase

On Monday, a museum had 150 visitors. On Tuesday it had 260 visitors.

ESTIMATE the percent change in the number of visitors to the museum

• 75%

• 42%

• 57%

• 18%