12.31% is the change from 642 to 721
Calculation steps:
[( 721 - 642 ) ÷ 642] x 100 = 12.31%
Formula
Percentage change = [(721 - 642) / 642] x 100
Subtract the new number by the original number
721 - 642 = 79
79 ÷ 642 = 0.12305295950155763
0.12305295950155763 x 100 = 12.31%