31.18% is the change from 170 to 223
Calculation steps:
[( 223 - 170 ) ÷ 170] x 100 = 31.18%
Formula
Percentage change = [(223 - 170) / 170] x 100
Subtract the new number by the original number
223 - 170 = 53
53 ÷ 170 = 0.31176470588235294
0.31176470588235294 x 100 = 31.18%