39.18% is the change from 171 to 238
Calculation steps:
[( 238 - 171 ) ÷ 171] x 100 = 39.18%
Formula
Percentage change = [(238 - 171) / 171] x 100
Subtract the new number by the original number
238 - 171 = 67
67 ÷ 171 = 0.391812865497076
0.391812865497076 x 100 = 39.18%