-39.41% is the change from 170 to 103
Calculation steps:
[( 103 - 170 ) ÷ 170] x 100 = -39.41%
Formula
Percentage change = [(103 - 170) / 170] x 100
Subtract the new number by the original number
103 - 170 = -67
-67 ÷ 170 = -0.3941176470588235
-0.3941176470588235 x 100 = -39.41%