31% is the change from 329 to 431
Calculation steps:
[( 431 - 329 ) ÷ 329] x 100 = 31%
Formula
Percentage change = [(431 - 329) / 329] x 100
Subtract the new number by the original number
431 - 329 = 102
102 ÷ 329 = 0.3100303951367781
0.3100303951367781 x 100 = 31%