Percent Change and Percent Error

Front

What is percent change?

Back

Percent change is a measure of how much a quantity has increased or decreased relative to its original value, expressed as a percentage.

Front

How do you calculate percent change?

Back

Percent Change = ((New Value - Old Value) / Old Value) x 100.

Front

What is percent error?

Back

Percent error is a measure of how inaccurate a measurement is, expressed as a percentage of the actual value.

Front

How do you calculate percent error?

Back

Percent Error = (|Estimated Value - Actual Value| / Actual Value) x 100.

Front

If 27 out of 120 reptile owners own snakes, what is the percent of reptile owners that own snakes?

Back

22.5%.

Front

If the actual speed is 38 mph and the estimated speed is 35 mph, what is the percent error?

Back

7.9%.

Front

What is the percent change in laps swum from May (80 laps) to June (60 laps)?

Back

25% decrease.

Front

If 15% of toddlers have food allergies and 14,500 parents were polled, how many parents reported this?

Back

2,175 parents.

Front

What does a positive percent change indicate?

Back

A positive percent change indicates an increase in value.

Front

What does a negative percent change indicate?

Back

A negative percent change indicates a decrease in value.