39.4% is the change from 302 to 421
Calculation steps:
[( 421 - 302 ) ÷ 302] x 100 = 39.4%
Formula
Percentage change = [(421 - 302) / 302] x 100
Subtract the new number by the original number
421 - 302 = 119
119 ÷ 302 = 0.39403973509933776
0.39403973509933776 x 100 = 39.4%