-85.13% is the change from 861 to 128
Calculation steps:
[( 128 - 861 ) ÷ 861] x 100 = -85.13%
Formula
Percentage change = [(128 - 861) / 861] x 100
Subtract the new number by the original number
128 - 861 = -733
-733 ÷ 861 = -0.851335656213705
-0.851335656213705 x 100 = -85.13%