-6.42% is the change from 888 to 831
Calculation steps:
[( 831 - 888 ) ÷ 888] x 100 = -6.42%
Formula
Percentage change = [(831 - 888) / 888] x 100
Subtract the new number by the original number
831 - 888 = -57
-57 ÷ 888 = -0.06418918918918919
-0.06418918918918919 x 100 = -6.42%