-38.6% is the change from 171 to 105
Calculation steps:
[( 105 - 171 ) ÷ 171] x 100 = -38.6%
Formula
Percentage change = [(105 - 171) / 171] x 100
Subtract the new number by the original number
105 - 171 = -66
-66 ÷ 171 = -0.38596491228070173
-0.38596491228070173 x 100 = -38.6%