30.81% is the change from 344 to 450
Calculation steps:
[( 450 - 344 ) ÷ 344] x 100 = 30.81%
Formula
Percentage change = [(450 - 344) / 344] x 100
Subtract the new number by the original number
450 - 344 = 106
106 ÷ 344 = 0.3081395348837209
0.3081395348837209 x 100 = 30.81%