-16.57% is the change from 996 to 831
Calculation steps:
[( 831 - 996 ) ÷ 996] x 100 = -16.57%
Formula
Percentage change = [(831 - 996) / 996] x 100
Subtract the new number by the original number
831 - 996 = -165
-165 ÷ 996 = -0.16566265060240964
-0.16566265060240964 x 100 = -16.57%