-91.16% is the change from 916 to 81
Calculation steps:
[( 81 - 916 ) ÷ 916] x 100 = -91.16%
Formula
Percentage change = [(81 - 916) / 916] x 100
Subtract the new number by the original number
81 - 916 = -835
-835 ÷ 916 = -0.9115720524017468
-0.9115720524017468 x 100 = -91.16%