-51.76% is the change from 170 to 82
Calculation steps:
[( 82 - 170 ) ÷ 170] x 100 = -51.76%
Formula
Percentage change = [(82 - 170) / 170] x 100
Subtract the new number by the original number
82 - 170 = -88
-88 ÷ 170 = -0.5176470588235295
-0.5176470588235295 x 100 = -51.76%