Percent Change and Error

Front

What is percent error?

Back

Percent error is a measure of how inaccurate a measurement is, expressed as a percentage of the true value. It is calculated using the formula: Percent Error = |(Estimated Value - Actual Value)| / Actual Value * 100.

Front

How do you calculate percent change?

Back

Percent change is calculated using the formula: Percent Change = (New Value - Old Value) / Old Value * 100.

Front

What is the formula for calculating percent error?

Back

The formula for percent error is: Percent Error = |(Estimated Value - Actual Value)| / Actual Value * 100.

Front

If Tim guessed he had 650 football cards but actually had 548, what is his percent error?

Back

18.6%

Front

If Meg estimated the weight of a rock to be 21 grams but it was actually 23 grams, what is her percent error?

Back

8.7%

Front

Calculate the percent change from 34 minutes to 48 minutes.

Back

41.2% increase

Front

If Rick predicted he would score 78 on his math quiz but scored 84, what is his percent error?

Back

7.1%

Front

Calculate the percent change from $323 to $542.

Back

67.8% increase

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.