30.59% is the change from 170 to 222
Calculation steps:
[( 222 - 170 ) ÷ 170] x 100 = 30.59%
Formula
Percentage change = [(222 - 170) / 170] x 100
Subtract the new number by the original number
222 - 170 = 52
52 ÷ 170 = 0.3058823529411765
0.3058823529411765 x 100 = 30.59%