26.71% is the change from 644 to 816
Calculation steps:
[( 816 - 644 ) ÷ 644] x 100 = 26.71%
Formula
Percentage change = [(816 - 644) / 644] x 100
Subtract the new number by the original number
816 - 644 = 172
172 ÷ 644 = 0.2670807453416149
0.2670807453416149 x 100 = 26.71%