12.28% is the change from 448 to 503
Calculation steps:
[( 503 - 448 ) ÷ 448] x 100 = 12.28%
Formula
Percentage change = [(503 - 448) / 448] x 100
Subtract the new number by the original number
503 - 448 = 55
55 ÷ 448 = 0.12276785714285714
0.12276785714285714 x 100 = 12.28%