-4.7% is the change from 872 to 831
Calculation steps:
[( 831 - 872 ) ÷ 872] x 100 = -4.7%
Formula
Percentage change = [(831 - 872) / 872] x 100
Subtract the new number by the original number
831 - 872 = -41
-41 ÷ 872 = -0.047018348623853214
-0.047018348623853214 x 100 = -4.7%