-42.94% is the change from 170 to 97
Calculation steps:
[( 97 - 170 ) ÷ 170] x 100 = -42.94%
Formula
Percentage change = [(97 - 170) / 170] x 100
Subtract the new number by the original number
97 - 170 = -73
-73 ÷ 170 = -0.4294117647058823
-0.4294117647058823 x 100 = -42.94%