-99.77% is the change from 863 to 2
Calculation steps:
[( 2 - 863 ) ÷ 863] x 100 = -99.77%
Formula
Percentage change = [(2 - 863) / 863] x 100
Subtract the new number by the original number
2 - 863 = -861
-861 ÷ 863 = -0.9976825028968713
-0.9976825028968713 x 100 = -99.77%