-81.54% is the change from 845 to 156
Calculation steps:
[( 156 - 845 ) ÷ 845] x 100 = -81.54%
Formula
Percentage change = [(156 - 845) / 845] x 100
Subtract the new number by the original number
156 - 845 = -689
-689 ÷ 845 = -0.8153846153846154
-0.8153846153846154 x 100 = -81.54%