-35.94% is the change from 128 to 82
Calculation steps:
[( 82 - 128 ) ÷ 128] x 100 = -35.94%
Formula
Percentage change = [(82 - 128) / 128] x 100
Subtract the new number by the original number
82 - 128 = -46
-46 ÷ 128 = -0.359375
-0.359375 x 100 = -35.94%