19.88% is the change from 171 to 205
Calculation steps:
[( 205 - 171 ) ÷ 171] x 100 = 19.88%
Formula
Percentage change = [(205 - 171) / 171] x 100
Subtract the new number by the original number
205 - 171 = 34
34 ÷ 171 = 0.19883040935672514
0.19883040935672514 x 100 = 19.88%