38.44% is the change from 450 to 623
Calculation steps:
[( 623 - 450 ) ÷ 450] x 100 = 38.44%
Formula
Percentage change = [(623 - 450) / 450] x 100
Subtract the new number by the original number
623 - 450 = 173
173 ÷ 450 = 0.3844444444444444
0.3844444444444444 x 100 = 38.44%