-83.83% is the change from 507 to 82
Calculation steps:
[( 82 - 507 ) ÷ 507] x 100 = -83.83%
Formula
Percentage change = [(82 - 507) / 507] x 100
Subtract the new number by the original number
82 - 507 = -425
-425 ÷ 507 = -0.8382642998027613
-0.8382642998027613 x 100 = -83.83%