-82.85% is the change from 939 to 161
Calculation steps:
[( 161 - 939 ) ÷ 939] x 100 = -82.85%
Formula
Percentage change = [(161 - 939) / 939] x 100
Subtract the new number by the original number
161 - 939 = -778
-778 ÷ 939 = -0.8285410010649628
-0.8285410010649628 x 100 = -82.85%