26.47% is the change from 646 to 817
Calculation steps:
[( 817 - 646 ) ÷ 646] x 100 = 26.47%
Formula
Percentage change = [(817 - 646) / 646] x 100
Subtract the new number by the original number
817 - 646 = 171
171 ÷ 646 = 0.2647058823529412
0.2647058823529412 x 100 = 26.47%