-8.09% is the change from 939 to 863
Calculation steps:
[( 863 - 939 ) ÷ 939] x 100 = -8.09%
Formula
Percentage change = [(863 - 939) / 939] x 100
Subtract the new number by the original number
863 - 939 = -76
-76 ÷ 939 = -0.08093716719914804
-0.08093716719914804 x 100 = -8.09%