31.4% is the change from 344 to 452
Calculation steps:
[( 452 - 344 ) ÷ 344] x 100 = 31.4%
Formula
Percentage change = [(452 - 344) / 344] x 100
Subtract the new number by the original number
452 - 344 = 108
108 ÷ 344 = 0.313953488372093
0.313953488372093 x 100 = 31.4%