2.74% is the change from 438 to 450
Calculation steps:
[( 450 - 438 ) ÷ 438] x 100 = 2.74%
Formula
Percentage change = [(450 - 438) / 438] x 100
Subtract the new number by the original number
450 - 438 = 12
12 ÷ 438 = 0.0273972602739726
0.0273972602739726 x 100 = 2.74%