-81.45% is the change from 857 to 159
Calculation steps:
[( 159 - 857 ) ÷ 857] x 100 = -81.45%
Formula
Percentage change = [(159 - 857) / 857] x 100
Subtract the new number by the original number
159 - 857 = -698
-698 ÷ 857 = -0.8144690781796966
-0.8144690781796966 x 100 = -81.45%