-89.12% is the change from 285 to 31
Calculation steps:
[( 31 - 285 ) ÷ 285] x 100 = -89.12%
Formula
Percentage change = [(31 - 285) / 285] x 100
Subtract the new number by the original number
31 - 285 = -254
-254 ÷ 285 = -0.8912280701754386
-0.8912280701754386 x 100 = -89.12%