7.93% is the change from 668 to 721
Calculation steps:
[( 721 - 668 ) ÷ 668] x 100 = 7.93%
Formula
Percentage change = [(721 - 668) / 668] x 100
Subtract the new number by the original number
721 - 668 = 53
53 ÷ 668 = 0.07934131736526946
0.07934131736526946 x 100 = 7.93%