26.86% is the change from 644 to 817
Calculation steps:
[( 817 - 644 ) ÷ 644] x 100 = 26.86%
Formula
Percentage change = [(817 - 644) / 644] x 100
Subtract the new number by the original number
817 - 644 = 173
173 ÷ 644 = 0.2686335403726708
0.2686335403726708 x 100 = 26.86%