12.78% is the change from 446 to 503
Calculation steps:
[( 503 - 446 ) ÷ 446] x 100 = 12.78%
Formula
Percentage change = [(503 - 446) / 446] x 100
Subtract the new number by the original number
503 - 446 = 57
57 ÷ 446 = 0.12780269058295965
0.12780269058295965 x 100 = 12.78%