33.53% is the change from 170 to 227
Calculation steps:
[( 227 - 170 ) ÷ 170] x 100 = 33.53%
Formula
Percentage change = [(227 - 170) / 170] x 100
Subtract the new number by the original number
227 - 170 = 57
57 ÷ 170 = 0.3352941176470588
0.3352941176470588 x 100 = 33.53%