-28.15% is the change from 238 to 171
Calculation steps:
[( 171 - 238 ) ÷ 238] x 100 = -28.15%
Formula
Percentage change = [(171 - 238) / 238] x 100
Subtract the new number by the original number
171 - 238 = -67
-67 ÷ 238 = -0.2815126050420168
-0.2815126050420168 x 100 = -28.15%