0.15% is the change from 667 to 668
Calculation steps:
[( 668 - 667 ) ÷ 667] x 100 = 0.15%
Formula
Percentage change = [(668 - 667) / 667] x 100
Subtract the new number by the original number
668 - 667 = 1
1 ÷ 667 = 0.0014992503748125937
0.0014992503748125937 x 100 = 0.15%