-3.6% is the change from 862 to 831
Calculation steps:
[( 831 - 862 ) ÷ 862] x 100 = -3.6%
Formula
Percentage change = [(831 - 862) / 862] x 100
Subtract the new number by the original number
831 - 862 = -31
-31 ÷ 862 = -0.03596287703016241
-0.03596287703016241 x 100 = -3.6%