19.07% is the change from 540 to 643
Calculation steps:
[( 643 - 540 ) ÷ 540] x 100 = 19.07%
Formula
Percentage change = [(643 - 540) / 540] x 100
Subtract the new number by the original number
643 - 540 = 103
103 ÷ 540 = 0.19074074074074074
0.19074074074074074 x 100 = 19.07%