22.22% is the change from 171 to 209
Calculation steps:
[( 209 - 171 ) ÷ 171] x 100 = 22.22%
Formula
Percentage change = [(209 - 171) / 171] x 100
Subtract the new number by the original number
209 - 171 = 38
38 ÷ 171 = 0.2222222222222222
0.2222222222222222 x 100 = 22.22%