18.97% is the change from 543 to 646
Calculation steps:
[( 646 - 543 ) ÷ 543] x 100 = 18.97%
Formula
Percentage change = [(646 - 543) / 543] x 100
Subtract the new number by the original number
646 - 543 = 103
103 ÷ 543 = 0.18968692449355432
0.18968692449355432 x 100 = 18.97%