19.78% is the change from 536 to 642
Calculation steps:
[( 642 - 536 ) ÷ 536] x 100 = 19.78%
Formula
Percentage change = [(642 - 536) / 536] x 100
Subtract the new number by the original number
642 - 536 = 106
106 ÷ 536 = 0.19776119402985073
0.19776119402985073 x 100 = 19.78%