-87.71% is the change from 667 to 82
Calculation steps:
[( 82 - 667 ) ÷ 667] x 100 = -87.71%
Formula
Percentage change = [(82 - 667) / 667] x 100
Subtract the new number by the original number
82 - 667 = -585
-585 ÷ 667 = -0.8770614692653673
-0.8770614692653673 x 100 = -87.71%