41450% is the change from 2 to 831
Calculation steps:
[( 831 - 2 ) ÷ 2] x 100 = 41450%
Formula
Percentage change = [(831 - 2) / 2] x 100
Subtract the new number by the original number
831 - 2 = 829
829 ÷ 2 = 414.5
414.5 x 100 = 41450%
Example