30.65% is the change from 646 to 844
Calculation steps:
[( 844 - 646 ) ÷ 646] x 100 = 30.65%
Formula
Percentage change = [(844 - 646) / 646] x 100
Subtract the new number by the original number
844 - 646 = 198
198 ÷ 646 = 0.3065015479876161
0.3065015479876161 x 100 = 30.65%