-99.68% is the change from 630 to 2
Calculation steps:
[( 2 - 630 ) ÷ 630] x 100 = -99.68%
Formula
Percentage change = [(2 - 630) / 630] x 100
Subtract the new number by the original number
2 - 630 = -628
-628 ÷ 630 = -0.9968253968253968
-0.9968253968253968 x 100 = -99.68%