-8.95% is the change from 939 to 855
Calculation steps:
[( 855 - 939 ) ÷ 939] x 100 = -8.95%
Formula
Percentage change = [(855 - 939) / 939] x 100
Subtract the new number by the original number
855 - 939 = -84
-84 ÷ 939 = -0.08945686900958466
-0.08945686900958466 x 100 = -8.95%