-80.12% is the change from 649 to 129
Calculation steps:
[( 129 - 649 ) ÷ 649] x 100 = -80.12%
Formula
Percentage change = [(129 - 649) / 649] x 100
Subtract the new number by the original number
129 - 649 = -520
-520 ÷ 649 = -0.8012326656394453
-0.8012326656394453 x 100 = -80.12%