-96.18% is the change from 811 to 31
Calculation steps:
[( 31 - 811 ) ÷ 811] x 100 = -96.18%
Formula
Percentage change = [(31 - 811) / 811] x 100
Subtract the new number by the original number
31 - 811 = -780
-780 ÷ 811 = -0.9617755856966708
-0.9617755856966708 x 100 = -96.18%