12.83% is the change from 639 to 721
Calculation steps:
[( 721 - 639 ) ÷ 639] x 100 = 12.83%
Formula
Percentage change = [(721 - 639) / 639] x 100
Subtract the new number by the original number
721 - 639 = 82
82 ÷ 639 = 0.12832550860719874
0.12832550860719874 x 100 = 12.83%