2500% is the change from 1 to 26
Calculation steps:
[( 26 - 1 ) ÷ 1] x 100 = 2500%
Formula
Percentage change = [(26 - 1) / 1] x 100
Subtract the new number by the original number
26 - 1 = 25
25 ÷ 1 = 25
25 x 100 = 2500%
Example