-15.63% is the change from 985 to 831
Calculation steps:
[( 831 - 985 ) ÷ 985] x 100 = -15.63%
Formula
Percentage change = [(831 - 985) / 985] x 100
Subtract the new number by the original number
831 - 985 = -154
-154 ÷ 985 = -0.15634517766497463
-0.15634517766497463 x 100 = -15.63%