21.09% is the change from 531 to 643
Calculation steps:
[( 643 - 531 ) ÷ 531] x 100 = 21.09%
Formula
Percentage change = [(643 - 531) / 531] x 100
Subtract the new number by the original number
643 - 531 = 112
112 ÷ 531 = 0.21092278719397364
0.21092278719397364 x 100 = 21.09%