21.67% is the change from 646 to 786
Calculation steps:
[( 786 - 646 ) ÷ 646] x 100 = 21.67%
Formula
Percentage change = [(786 - 646) / 646] x 100
Subtract the new number by the original number
786 - 646 = 140
140 ÷ 646 = 0.21671826625386997
0.21671826625386997 x 100 = 21.67%