-13.35% is the change from 959 to 831
Calculation steps:
[( 831 - 959 ) ÷ 959] x 100 = -13.35%
Formula
Percentage change = [(831 - 959) / 959] x 100
Subtract the new number by the original number
831 - 959 = -128
-128 ÷ 959 = -0.1334723670490094
-0.1334723670490094 x 100 = -13.35%