18.24% is the change from 170 to 201
Calculation steps:
[( 201 - 170 ) ÷ 170] x 100 = 18.24%
Formula
Percentage change = [(201 - 170) / 170] x 100
Subtract the new number by the original number
201 - 170 = 31
31 ÷ 170 = 0.18235294117647058
0.18235294117647058 x 100 = 18.24%