-91.78% is the change from 986 to 81
Calculation steps:
[( 81 - 986 ) ÷ 986] x 100 = -91.78%
Formula
Percentage change = [(81 - 986) / 986] x 100
Subtract the new number by the original number
81 - 986 = -905
-905 ÷ 986 = -0.9178498985801217
-0.9178498985801217 x 100 = -91.78%