0.15% is the change from 669 to 670
Calculation steps:
[( 670 - 669 ) ÷ 669] x 100 = 0.15%
Formula
Percentage change = [(670 - 669) / 669] x 100
Subtract the new number by the original number
670 - 669 = 1
1 ÷ 669 = 0.0014947683109118087
0.0014947683109118087 x 100 = 0.15%