33.92% is the change from 171 to 229
Calculation steps:
[( 229 - 171 ) ÷ 171] x 100 = 33.92%
Formula
Percentage change = [(229 - 171) / 171] x 100
Subtract the new number by the original number
229 - 171 = 58
58 ÷ 171 = 0.3391812865497076
0.3391812865497076 x 100 = 33.92%