-97.06% is the change from 170 to 5
Calculation steps:
[( 5 - 170 ) ÷ 170] x 100 = -97.06%
Formula
Percentage change = [(5 - 170) / 170] x 100
Subtract the new number by the original number
5 - 170 = -165
-165 ÷ 170 = -0.9705882352941176
-0.9705882352941176 x 100 = -97.06%