26.17% is the change from 642 to 810
Calculation steps:
[( 810 - 642 ) ÷ 642] x 100 = 26.17%
Formula
Percentage change = [(810 - 642) / 642] x 100
Subtract the new number by the original number
810 - 642 = 168
168 ÷ 642 = 0.2616822429906542
0.2616822429906542 x 100 = 26.17%