-96.32% is the change from 842 to 31
Calculation steps:
[( 31 - 842 ) ÷ 842] x 100 = -96.32%
Formula
Percentage change = [(31 - 842) / 842] x 100
Subtract the new number by the original number
31 - 842 = -811
-811 ÷ 842 = -0.9631828978622328
-0.9631828978622328 x 100 = -96.32%