42.35% is the change from 170 to 242
Calculation steps:
[( 242 - 170 ) ÷ 170] x 100 = 42.35%
Formula
Percentage change = [(242 - 170) / 170] x 100
Subtract the new number by the original number
242 - 170 = 72
72 ÷ 170 = 0.4235294117647059
0.4235294117647059 x 100 = 42.35%