-82.93% is the change from 861 to 147
Calculation steps:
[( 147 - 861 ) ÷ 861] x 100 = -82.93%
Formula
Percentage change = [(147 - 861) / 861] x 100
Subtract the new number by the original number
147 - 861 = -714
-714 ÷ 861 = -0.8292682926829268
-0.8292682926829268 x 100 = -82.93%