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Maths Exercices

Percent of change

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%.


What is the percent of change from 20 to 14?
6 % increase
34 % decrease
30 % increase
30 % decrease