-0.3% is the change from 672 to 670
Calculation steps:
[( 670 - 672 ) ÷ 672] x 100 = -0.3%
Formula
Percentage change = [(670 - 672) / 672] x 100
Subtract the new number by the original number
670 - 672 = -2
-2 ÷ 672 = -0.002976190476190476
-0.002976190476190476 x 100 = -0.3%