21.81% is the change from 518 to 631
Calculation steps:
[( 631 - 518 ) ÷ 518] x 100 = 21.81%
Formula
Percentage change = [(631 - 518) / 518] x 100
Subtract the new number by the original number
631 - 518 = 113
113 ÷ 518 = 0.21814671814671815
0.21814671814671815 x 100 = 21.81%