253.91% is the change from 256 to 906
Calculation steps:
[( 906 - 256 ) ÷ 256] x 100 = 253.91%
Formula
Percentage change = [(906 - 256) / 256] x 100
Subtract the new number by the original number
906 - 256 = 650
650 ÷ 256 = 2.5390625
2.5390625 x 100 = 253.91%