32.63% is the change from 331 to 439
Calculation steps:
[( 439 - 331 ) ÷ 331] x 100 = 32.63%
Formula
Percentage change = [(439 - 331) / 331] x 100
Subtract the new number by the original number
439 - 331 = 108
108 ÷ 331 = 0.32628398791540786
0.32628398791540786 x 100 = 32.63%