-0.72% is the change from 837 to 831
Calculation steps:
[( 831 - 837 ) ÷ 837] x 100 = -0.72%
Formula
Percentage change = [(831 - 837) / 837] x 100
Subtract the new number by the original number
831 - 837 = -6
-6 ÷ 837 = -0.007168458781362007
-0.007168458781362007 x 100 = -0.72%