-83.57% is the change from 499 to 82
Calculation steps:
[( 82 - 499 ) ÷ 499] x 100 = -83.57%
Formula
Percentage change = [(82 - 499) / 499] x 100
Subtract the new number by the original number
82 - 499 = -417
-417 ÷ 499 = -0.8356713426853707
-0.8356713426853707 x 100 = -83.57%