A 25 stamp is increased to 30. What percent of the original price does this increase represent?

=20% increase

Step-by-step explanation:

To find the percent increase,

increase = (new - original) / original * 100%

Then new price is 30 and the original price is 25

increase = (30-25) / 25 * 100%

=5/25 * 100%

=.2 * 100%

=20% increase