-83.06% is the change from 850 to 144
Calculation steps:
[( 144 - 850 ) ÷ 850] x 100 = -83.06%
Formula
Percentage change = [(144 - 850) / 850] x 100
Subtract the new number by the original number
144 - 850 = -706
-706 ÷ 850 = -0.8305882352941176
-0.8305882352941176 x 100 = -83.06%