156% is the change from 100 to 256
Calculation steps:
[( 256 - 100 ) ÷ 100] x 100 = 156%
Formula
Percentage change = [(256 - 100) / 100] x 100
Subtract the new number by the original number
256 - 100 = 156
156 ÷ 100 = 1.56
1.56 x 100 = 156%
Example