-91.83% is the change from 992 to 81
Calculation steps:
[( 81 - 992 ) ÷ 992] x 100 = -91.83%
Formula
Percentage change = [(81 - 992) / 992] x 100
Subtract the new number by the original number
81 - 992 = -911
-911 ÷ 992 = -0.9183467741935484
-0.9183467741935484 x 100 = -91.83%