31.58% is the change from 171 to 225
Calculation steps:
[( 225 - 171 ) ÷ 171] x 100 = 31.58%
Formula
Percentage change = [(225 - 171) / 171] x 100
Subtract the new number by the original number
225 - 171 = 54
54 ÷ 171 = 0.3157894736842105
0.3157894736842105 x 100 = 31.58%