30.95% is the change from 168 to 220
Calculation steps:
[( 220 - 168 ) ÷ 168] x 100 = 30.95%
Formula
Percentage change = [(220 - 168) / 168] x 100
Subtract the new number by the original number
220 - 168 = 52
52 ÷ 168 = 0.30952380952380953
0.30952380952380953 x 100 = 30.95%