21.98% is the change from 646 to 788
Calculation steps:
[( 788 - 646 ) ÷ 646] x 100 = 21.98%
Formula
Percentage change = [(788 - 646) / 646] x 100
Subtract the new number by the original number
788 - 646 = 142
142 ÷ 646 = 0.21981424148606812
0.21981424148606812 x 100 = 21.98%