11.87% is the change from 455 to 509
Calculation steps:
[( 509 - 455 ) ÷ 455] x 100 = 11.87%
Formula
Percentage change = [(509 - 455) / 455] x 100
Subtract the new number by the original number
509 - 455 = 54
54 ÷ 455 = 0.11868131868131868
0.11868131868131868 x 100 = 11.87%