-99.38% is the change from 650 to 4
Calculation steps:
[( 4 - 650 ) ÷ 650] x 100 = -99.38%
Formula
Percentage change = [(4 - 650) / 650] x 100
Subtract the new number by the original number
4 - 650 = -646
-646 ÷ 650 = -0.9938461538461538
-0.9938461538461538 x 100 = -99.38%