29.88% is the change from 646 to 839
Calculation steps:
[( 839 - 646 ) ÷ 646] x 100 = 29.88%
Formula
Percentage change = [(839 - 646) / 646] x 100
Subtract the new number by the original number
839 - 646 = 193
193 ÷ 646 = 0.29876160990712075
0.29876160990712075 x 100 = 29.88%