-84.9% is the change from 543 to 82
Calculation steps:
[( 82 - 543 ) ÷ 543] x 100 = -84.9%
Formula
Percentage change = [(82 - 543) / 543] x 100
Subtract the new number by the original number
82 - 543 = -461
-461 ÷ 543 = -0.848987108655617
-0.848987108655617 x 100 = -84.9%