255.13% is the change from 234 to 831
Calculation steps:
[( 831 - 234 ) ÷ 234] x 100 = 255.13%
Formula
Percentage change = [(831 - 234) / 234] x 100
Subtract the new number by the original number
831 - 234 = 597
597 ÷ 234 = 2.551282051282051
2.551282051282051 x 100 = 255.13%