-83.27% is the change from 490 to 82
Calculation steps:
[( 82 - 490 ) ÷ 490] x 100 = -83.27%
Formula
Percentage change = [(82 - 490) / 490] x 100
Subtract the new number by the original number
82 - 490 = -408
-408 ÷ 490 = -0.8326530612244898
-0.8326530612244898 x 100 = -83.27%