29.59% is the change from 338 to 438
Calculation steps:
[( 438 - 338 ) ÷ 338] x 100 = 29.59%
Formula
Percentage change = [(438 - 338) / 338] x 100
Subtract the new number by the original number
438 - 338 = 100
100 ÷ 338 = 0.2958579881656805
0.2958579881656805 x 100 = 29.59%