-38.24% is the change from 170 to 105
Calculation steps:
[( 105 - 170 ) ÷ 170] x 100 = -38.24%
Formula
Percentage change = [(105 - 170) / 170] x 100
Subtract the new number by the original number
105 - 170 = -65
-65 ÷ 170 = -0.38235294117647056
-0.38235294117647056 x 100 = -38.24%