-80.83% is the change from 939 to 180
Calculation steps:
[( 180 - 939 ) ÷ 939] x 100 = -80.83%
Formula
Percentage change = [(180 - 939) / 939] x 100
Subtract the new number by the original number
180 - 939 = -759
-759 ÷ 939 = -0.8083067092651757
-0.8083067092651757 x 100 = -80.83%