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Percents

The percent of change is the ratio of the amount of change to the original amount.

• When an amount increases, the percent of change is a percent of increase.
• When the amount decreases, the percent of change is negative. You can also state a negative percent of change as a percent of decrease.

or

What is the percent of change from 30 to 24?

 Percent of change = = = = -0.2x100 = -20%

The percent of decrease is 20%.

What is the percent of change from 8 to 10?

 Percent of change = = = = 0.25x100 = 25%

The percent of increase is 25%.