34.12% is the change from 170 to 228
Calculation steps:
[( 228 - 170 ) ÷ 170] x 100 = 34.12%
Formula
Percentage change = [(228 - 170) / 170] x 100
Subtract the new number by the original number
228 - 170 = 58
58 ÷ 170 = 0.3411764705882353
0.3411764705882353 x 100 = 34.12%