-96.55% is the change from 899 to 31
Calculation steps:
[( 31 - 899 ) ÷ 899] x 100 = -96.55%
Formula
Percentage change = [(31 - 899) / 899] x 100
Subtract the new number by the original number
31 - 899 = -868
-868 ÷ 899 = -0.9655172413793104
-0.9655172413793104 x 100 = -96.55%