39.07% is the change from 302 to 420
Calculation steps:
[( 420 - 302 ) ÷ 302] x 100 = 39.07%
Formula
Percentage change = [(420 - 302) / 302] x 100
Subtract the new number by the original number
420 - 302 = 118
118 ÷ 302 = 0.39072847682119205
0.39072847682119205 x 100 = 39.07%