-86.75% is the change from 619 to 82
Calculation steps:
[( 82 - 619 ) ÷ 619] x 100 = -86.75%
Formula
Percentage change = [(82 - 619) / 619] x 100
Subtract the new number by the original number
82 - 619 = -537
-537 ÷ 619 = -0.8675282714054927
-0.8675282714054927 x 100 = -86.75%