31450% is the change from 2 to 631
Calculation steps:
[( 631 - 2 ) ÷ 2] x 100 = 31450%
Formula
Percentage change = [(631 - 2) / 2] x 100
Subtract the new number by the original number
631 - 2 = 629
629 ÷ 2 = 314.5
314.5 x 100 = 31450%
Example