-85.51% is the change from 959 to 139
Calculation steps:
[( 139 - 959 ) ÷ 959] x 100 = -85.51%
Formula
Percentage change = [(139 - 959) / 959] x 100
Subtract the new number by the original number
139 - 959 = -820
-820 ÷ 959 = -0.8550573514077163
-0.8550573514077163 x 100 = -85.51%