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 actual value.

Front

How do you calculate percent error?

Back

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

Front

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

Back

7.9%.

Front

If a quantity increases from 53 to 62, what is the percent change?

Back

17.0% increase.

Front

If a price changes from $18.50 to $22.10, what is the percent change?

Back

19.5% increase.

Front

What percent of 125 is 18?

Back

14.4%.

Front

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

Back

2,175 parents.

Front

What does a percent increase indicate?

Back

A percent increase indicates how much a value has grown compared to its original amount.