19.74% is the change from 537 to 643
Calculation steps:
[( 643 - 537 ) ÷ 537] x 100 = 19.74%
Formula
Percentage change = [(643 - 537) / 537] x 100
Subtract the new number by the original number
643 - 537 = 106
106 ÷ 537 = 0.1973929236499069
0.1973929236499069 x 100 = 19.74%