-99.69% is the change from 650 to 2
Calculation steps:
[( 2 - 650 ) ÷ 650] x 100 = -99.69%
Formula
Percentage change = [(2 - 650) / 650] x 100
Subtract the new number by the original number
2 - 650 = -648
-648 ÷ 650 = -0.9969230769230769
-0.9969230769230769 x 100 = -99.69%