-89.73% is the change from 837 to 86
Calculation steps:
[( 86 - 837 ) ÷ 837] x 100 = -89.73%
Formula
Percentage change = [(86 - 837) / 837] x 100
Subtract the new number by the original number
86 - 837 = -751
-751 ÷ 837 = -0.8972520908004779
-0.8972520908004779 x 100 = -89.73%