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, compared to the true value, expressed as a percentage.

Front

How do you calculate percent error?

Back

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

Front

Find the percent of change from $18.50 to $22.10.

Back

19.5% increase.

Front

Eighteen is what percent of 125?

Back

14.4%.

Front

What percent of 80 marbles are red if 52 are red?

Back

65%.

Front

Find the percent of change from 53 words to 62 words.

Back

17.0% increase.

Front

Alex buys a car for $45,800 and sells it for $61,830. What is the percent of change?

Back

35% increase.

Front

What does a positive percent change indicate?

Back

A positive percent change indicates an increase in value.