18.63% is the change from 542 to 643
Calculation steps:
[( 643 - 542 ) ÷ 542] x 100 = 18.63%
Formula
Percentage change = [(643 - 542) / 542] x 100
Subtract the new number by the original number
643 - 542 = 101
101 ÷ 542 = 0.1863468634686347
0.1863468634686347 x 100 = 18.63%