-99.7% is the change from 672 to 2
Calculation steps:
[( 2 - 672 ) ÷ 672] x 100 = -99.7%
Formula
Percentage change = [(2 - 672) / 672] x 100
Subtract the new number by the original number
2 - 672 = -670
-670 ÷ 672 = -0.9970238095238095
-0.9970238095238095 x 100 = -99.7%