-96.18% is the change from 812 to 31
Calculation steps:
[( 31 - 812 ) ÷ 812] x 100 = -96.18%
Formula
Percentage change = [(31 - 812) / 812] x 100
Subtract the new number by the original number
31 - 812 = -781
-781 ÷ 812 = -0.9618226600985221
-0.9618226600985221 x 100 = -96.18%