12.58% is the change from 302 to 340
Calculation steps:
[( 340 - 302 ) ÷ 302] x 100 = 12.58%
Formula
Percentage change = [(340 - 302) / 302] x 100
Subtract the new number by the original number
340 - 302 = 38
38 ÷ 302 = 0.12582781456953643
0.12582781456953643 x 100 = 12.58%