-39.18% is the change from 171 to 104
Calculation steps:
[( 104 - 171 ) ÷ 171] x 100 = -39.18%
Formula
Percentage change = [(104 - 171) / 171] x 100
Subtract the new number by the original number
104 - 171 = -67
-67 ÷ 171 = -0.391812865497076
-0.391812865497076 x 100 = -39.18%