-90.19% is the change from 836 to 82
Calculation steps:
[( 82 - 836 ) ÷ 836] x 100 = -90.19%
Formula
Percentage change = [(82 - 836) / 836] x 100
Subtract the new number by the original number
82 - 836 = -754
-754 ÷ 836 = -0.9019138755980861
-0.9019138755980861 x 100 = -90.19%