-85.29% is the change from 170 to 25
Calculation steps:
[( 25 - 170 ) ÷ 170] x 100 = -85.29%
Formula
Percentage change = [(25 - 170) / 170] x 100
Subtract the new number by the original number
25 - 170 = -145
-145 ÷ 170 = -0.8529411764705882
-0.8529411764705882 x 100 = -85.29%