12.03% is the change from 449 to 503
Calculation steps:
[( 503 - 449 ) ÷ 449] x 100 = 12.03%
Formula
Percentage change = [(503 - 449) / 449] x 100
Subtract the new number by the original number
503 - 449 = 54
54 ÷ 449 = 0.12026726057906459
0.12026726057906459 x 100 = 12.03%