18.85% is the change from 541 to 643
Calculation steps:
[( 643 - 541 ) ÷ 541] x 100 = 18.85%
Formula
Percentage change = [(643 - 541) / 541] x 100
Subtract the new number by the original number
643 - 541 = 102
102 ÷ 541 = 0.18853974121996303
0.18853974121996303 x 100 = 18.85%