26.9% is the change from 171 to 217
Calculation steps:
[( 217 - 171 ) ÷ 171] x 100 = 26.9%
Formula
Percentage change = [(217 - 171) / 171] x 100
Subtract the new number by the original number
217 - 171 = 46
46 ÷ 171 = 0.26900584795321636
0.26900584795321636 x 100 = 26.9%