-99.08% is the change from 649 to 6
Calculation steps:
[( 6 - 649 ) ÷ 649] x 100 = -99.08%
Formula
Percentage change = [(6 - 649) / 649] x 100
Subtract the new number by the original number
6 - 649 = -643
-643 ÷ 649 = -0.9907550077041603
-0.9907550077041603 x 100 = -99.08%