-91.78% is the change from 985 to 81
Calculation steps:
[( 81 - 985 ) ÷ 985] x 100 = -91.78%
Formula
Percentage change = [(81 - 985) / 985] x 100
Subtract the new number by the original number
81 - 985 = -904
-904 ÷ 985 = -0.917766497461929
-0.917766497461929 x 100 = -91.78%