8.38% is the change from 668 to 724
Calculation steps:
[( 724 - 668 ) ÷ 668] x 100 = 8.38%
Formula
Percentage change = [(724 - 668) / 668] x 100
Subtract the new number by the original number
724 - 668 = 56
56 ÷ 668 = 0.08383233532934131
0.08383233532934131 x 100 = 8.38%