32.33% is the change from 331 to 438
Calculation steps:
[( 438 - 331 ) ÷ 331] x 100 = 32.33%
Formula
Percentage change = [(438 - 331) / 331] x 100
Subtract the new number by the original number
438 - 331 = 107
107 ÷ 331 = 0.32326283987915405
0.32326283987915405 x 100 = 32.33%