-0.96% is the change from 831 to 823
Calculation steps:
[( 823 - 831 ) ÷ 831] x 100 = -0.96%
Formula
Percentage change = [(823 - 831) / 831] x 100
Subtract the new number by the original number
823 - 831 = -8
-8 ÷ 831 = -0.009626955475330927
-0.009626955475330927 x 100 = -0.96%