-87.35% is the change from 648 to 82
Calculation steps:
[( 82 - 648 ) ÷ 648] x 100 = -87.35%
Formula
Percentage change = [(82 - 648) / 648] x 100
Subtract the new number by the original number
82 - 648 = -566
-566 ÷ 648 = -0.8734567901234568
-0.8734567901234568 x 100 = -87.35%