-97.73% is the change from 837 to 19
Calculation steps:
[( 19 - 837 ) ÷ 837] x 100 = -97.73%
Formula
Percentage change = [(19 - 837) / 837] x 100
Subtract the new number by the original number
19 - 837 = -818
-818 ÷ 837 = -0.977299880525687
-0.977299880525687 x 100 = -97.73%