25600% is the change from 1 to 257
Calculation steps:
[( 257 - 1 ) ÷ 1] x 100 = 25600%
Formula
Percentage change = [(257 - 1) / 1] x 100
Subtract the new number by the original number
257 - 1 = 256
256 ÷ 1 = 256
256 x 100 = 25600%
Example