-99.3% is the change from 861 to 6
Calculation steps:
[( 6 - 861 ) ÷ 861] x 100 = -99.3%
Formula
Percentage change = [(6 - 861) / 861] x 100
Subtract the new number by the original number
6 - 861 = -855
-855 ÷ 861 = -0.9930313588850174
-0.9930313588850174 x 100 = -99.3%