-8.16% is the change from 931 to 855
Calculation steps:
[( 855 - 931 ) ÷ 931] x 100 = -8.16%
Formula
Percentage change = [(855 - 931) / 931] x 100
Subtract the new number by the original number
855 - 931 = -76
-76 ÷ 931 = -0.08163265306122448
-0.08163265306122448 x 100 = -8.16%