25% is the change from 20 to 25
Calculation steps:
[( 25 - 20 ) ÷ 20] x 100 = 25%
Formula
Percentage change = [(25 - 20) / 20] x 100
Subtract the new number by the original number
25 - 20 = 5
5 ÷ 20 = 0.25
0.25 x 100 = 25%
Example