34.81% is the change from 339 to 457
Calculation steps:
[( 457 - 339 ) ÷ 339] x 100 = 34.81%
Formula
Percentage change = [(457 - 339) / 339] x 100
Subtract the new number by the original number
457 - 339 = 118
118 ÷ 339 = 0.3480825958702065
0.3480825958702065 x 100 = 34.81%