-6.1% is the change from 885 to 831
Calculation steps:
[( 831 - 885 ) ÷ 885] x 100 = -6.1%
Formula
Percentage change = [(831 - 885) / 885] x 100
Subtract the new number by the original number
831 - 885 = -54
-54 ÷ 885 = -0.061016949152542375
-0.061016949152542375 x 100 = -6.1%