-84.2% is the change from 861 to 136
Calculation steps:
[( 136 - 861 ) ÷ 861] x 100 = -84.2%
Formula
Percentage change = [(136 - 861) / 861] x 100
Subtract the new number by the original number
136 - 861 = -725
-725 ÷ 861 = -0.8420441347270615
-0.8420441347270615 x 100 = -84.2%