-99.07% is the change from 863 to 8
Calculation steps:
[( 8 - 863 ) ÷ 863] x 100 = -99.07%
Formula
Percentage change = [(8 - 863) / 863] x 100
Subtract the new number by the original number
8 - 863 = -855
-855 ÷ 863 = -0.9907300115874855
-0.9907300115874855 x 100 = -99.07%