25500% is the change from 2 to 512
Calculation steps:
[( 512 - 2 ) ÷ 2] x 100 = 25500%
Formula
Percentage change = [(512 - 2) / 2] x 100
Subtract the new number by the original number
512 - 2 = 510
510 ÷ 2 = 255
255 x 100 = 25500%
Example