18.83% is the change from 531 to 631
Calculation steps:
[( 631 - 531 ) ÷ 531] x 100 = 18.83%
Formula
Percentage change = [(631 - 531) / 531] x 100
Subtract the new number by the original number
631 - 531 = 100
100 ÷ 531 = 0.18832391713747645
0.18832391713747645 x 100 = 18.83%