12.6% is the change from 643 to 724
Calculation steps:
[( 724 - 643 ) ÷ 643] x 100 = 12.6%
Formula
Percentage change = [(724 - 643) / 643] x 100
Subtract the new number by the original number
724 - 643 = 81
81 ÷ 643 = 0.12597200622083982
0.12597200622083982 x 100 = 12.6%