15.07% is the change from 438 to 504
Calculation steps:
[( 504 - 438 ) ÷ 438] x 100 = 15.07%
Formula
Percentage change = [(504 - 438) / 438] x 100
Subtract the new number by the original number
504 - 438 = 66
66 ÷ 438 = 0.1506849315068493
0.1506849315068493 x 100 = 15.07%