-90.59% is the change from 871 to 82
Calculation steps:
[( 82 - 871 ) ÷ 871] x 100 = -90.59%
Formula
Percentage change = [(82 - 871) / 871] x 100
Subtract the new number by the original number
82 - 871 = -789
-789 ÷ 871 = -0.9058553386911596
-0.9058553386911596 x 100 = -90.59%