11.53% is the change from 451 to 503
Calculation steps:
[( 503 - 451 ) ÷ 451] x 100 = 11.53%
Formula
Percentage change = [(503 - 451) / 451] x 100
Subtract the new number by the original number
503 - 451 = 52
52 ÷ 451 = 0.11529933481152993
0.11529933481152993 x 100 = 11.53%