224.61% is the change from 256 to 831
Calculation steps:
[( 831 - 256 ) ÷ 256] x 100 = 224.61%
Formula
Percentage change = [(831 - 256) / 256] x 100
Subtract the new number by the original number
831 - 256 = 575
575 ÷ 256 = 2.24609375
2.24609375 x 100 = 224.61%