-88.39% is the change from 939 to 109
Calculation steps:
[( 109 - 939 ) ÷ 939] x 100 = -88.39%
Formula
Percentage change = [(109 - 939) / 939] x 100
Subtract the new number by the original number
109 - 939 = -830
-830 ÷ 939 = -0.8839190628328009
-0.8839190628328009 x 100 = -88.39%