-88.05% is the change from 686 to 82
Calculation steps:
[( 82 - 686 ) ÷ 686] x 100 = -88.05%
Formula
Percentage change = [(82 - 686) / 686] x 100
Subtract the new number by the original number
82 - 686 = -604
-604 ÷ 686 = -0.880466472303207
-0.880466472303207 x 100 = -88.05%