-3.82% is the change from 864 to 831
Calculation steps:
[( 831 - 864 ) ÷ 864] x 100 = -3.82%
Formula
Percentage change = [(831 - 864) / 864] x 100
Subtract the new number by the original number
831 - 864 = -33
-33 ÷ 864 = -0.03819444444444445
-0.03819444444444445 x 100 = -3.82%