20.47% is the change from 171 to 206
Calculation steps:
[( 206 - 171 ) ÷ 171] x 100 = 20.47%
Formula
Percentage change = [(206 - 171) / 171] x 100
Subtract the new number by the original number
206 - 171 = 35
35 ÷ 171 = 0.2046783625730994
0.2046783625730994 x 100 = 20.47%