-28.45% is the change from 239 to 171
Calculation steps:
[( 171 - 239 ) ÷ 239] x 100 = -28.45%
Formula
Percentage change = [(171 - 239) / 239] x 100
Subtract the new number by the original number
171 - 239 = -68
-68 ÷ 239 = -0.28451882845188287
-0.28451882845188287 x 100 = -28.45%