48.51% is the change from 303 to 450
Calculation steps:
[( 450 - 303 ) ÷ 303] x 100 = 48.51%
Formula
Percentage change = [(450 - 303) / 303] x 100
Subtract the new number by the original number
450 - 303 = 147
147 ÷ 303 = 0.48514851485148514
0.48514851485148514 x 100 = 48.51%