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%.