25.78% is the change from 644 to 810
Calculation steps:
[( 810 - 644 ) ÷ 644] x 100 = 25.78%
Formula
Percentage change = [(810 - 644) / 644] x 100
Subtract the new number by the original number
810 - 644 = 166
166 ÷ 644 = 0.2577639751552795
0.2577639751552795 x 100 = 25.78%