0.6% is the change from 668 to 672
Calculation steps:
[( 672 - 668 ) ÷ 668] x 100 = 0.6%
Formula
Percentage change = [(672 - 668) / 668] x 100
Subtract the new number by the original number
672 - 668 = 4
4 ÷ 668 = 0.005988023952095809
0.005988023952095809 x 100 = 0.6%