-96.52% is the change from 861 to 30
Calculation steps:
[( 30 - 861 ) ÷ 861] x 100 = -96.52%
Formula
Percentage change = [(30 - 861) / 861] x 100
Subtract the new number by the original number
30 - 861 = -831
-831 ÷ 861 = -0.9651567944250871
-0.9651567944250871 x 100 = -96.52%