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 - 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 difference between the estimated value and the actual value.

Front

How do you calculate Percent Error?

Back

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

Front

If the estimated attendance was 15,000 and the actual attendance was 12,500, what is the Percent Error?

Back

20%.

Front

A game originally priced at $66.64 is on sale for $29.99. What is the Percent Change?

Back

54.9% Decrease.

Front

If Mrs. Ciampa had 27 students last year and 30 this year, what is the Percent Change in students?

Back

11% Increase.

Front

What is the formula for calculating Percent Decrease?

Back

Percent Decrease = ((Original Value - New Value) / Original Value) x 100.

Front

If a scooter's regular price is $65.50 and it is on sale for $52.40, what is the Percent Decrease?

Back

20%.

Front

From 45 mph to 24 mph, what is the Percent Change?

Back

47% Decrease.