Percent of Change

Front

What is Percent of Change?

Back

Percent of Change is a way to express how much a quantity has increased or decreased in relation to its original amount, usually expressed as a percentage.

Front

How do you calculate Percent Increase?

Back

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

Front

How do you calculate Percent Decrease?

Back

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

Front

If a price goes from $50 to $75, what is the percent increase?

Back

Percent Increase = ((75 - 50) / 50) x 100 = 50%.

Front

If a price goes from $100 to $80, what is the percent decrease?

Back

Percent Decrease = ((100 - 80) / 100) x 100 = 20%.

Front

What is the formula for finding the new value after a percent increase?

Back

New Value = Original Value x (1 + Percent Increase/100).

Front

What is the formula for finding the new value after a percent decrease?

Back

New Value = Original Value x (1 - Percent Decrease/100).

Front

If a student scored 70 out of 100 on a test and then scored 85 out of 100 on the next test, what is the percent increase in score?

Back

Percent Increase = ((85 - 70) / 70) x 100 = 21.43%.

Front

If a population decreases from 1,000 to 800, what is the percent decrease?

Back

Percent Decrease = ((1000 - 800) / 1000) x 100 = 20%.

Front

What does a percent change of 0% indicate?

Back

A percent change of 0% indicates that there has been no change in the value.