Percent Change/ 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) * 100.

Front

What is Percent Increase?

Back

Percent Increase is the amount of increase expressed as a percentage of the original value.

Front

What is Percent Decrease?

Back

Percent Decrease is the amount of decrease expressed as a percentage of the original value.

Front

If Ricky scored 80 and then 86, what is the percent change?

Back

7.5% increase.

Front

If a microwave costs $96 and is marked up to $115.20, what is the percent increase?

Back

20% Increase.

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.

Front

How do you calculate Percent Error?

Back

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

Front

If an archaeologist estimated a fossil to be 520 years old, but it was actually 500 years old, what is the percent error?

Back

4%.

Front

A school's population increased from 1250 to 2000 students. What is the percent of increase?

Back

60%.