-87.59% is the change from 661 to 82
Calculation steps:
[( 82 - 661 ) ÷ 661] x 100 = -87.59%
Formula
Percentage change = [(82 - 661) / 661] x 100
Subtract the new number by the original number
82 - 661 = -579
-579 ÷ 661 = -0.875945537065053
-0.875945537065053 x 100 = -87.59%