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 - Original Value) / Original 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 accepted value.

Front

How do you calculate Percent Error?

Back

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

Front

What is 15% of 82?

Back

12.3

Front

If an item costs $449 and has a 15% discount, what is the new cost?

Back

$381.65

Front

What is 30% of 130?

Back

39

Front

If the attendance was estimated at 15,000 but only 12,500 attended, what is the percent error?

Back

20%.

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.