-81.04% is the change from 939 to 178
Calculation steps:
[( 178 - 939 ) ÷ 939] x 100 = -81.04%
Formula
Percentage change = [(178 - 939) / 939] x 100
Subtract the new number by the original number
178 - 939 = -761
-761 ÷ 939 = -0.8104366347177849
-0.8104366347177849 x 100 = -81.04%