-91.79% is the change from 999 to 82
Calculation steps:
[( 82 - 999 ) ÷ 999] x 100 = -91.79%
Formula
Percentage change = [(82 - 999) / 999] x 100
Subtract the new number by the original number
82 - 999 = -917
-917 ÷ 999 = -0.9179179179179179
-0.9179179179179179 x 100 = -91.79%