-99.52% is the change from 837 to 4
Calculation steps:
[( 4 - 837 ) ÷ 837] x 100 = -99.52%
Formula
Percentage change = [(4 - 837) / 837] x 100
Subtract the new number by the original number
4 - 837 = -833
-833 ÷ 837 = -0.995221027479092
-0.995221027479092 x 100 = -99.52%