-13.1% is the change from 504 to 438
Calculation steps:
[( 438 - 504 ) ÷ 504] x 100 = -13.1%
Formula
Percentage change = [(438 - 504) / 504] x 100
Subtract the new number by the original number
438 - 504 = -66
-66 ÷ 504 = -0.13095238095238096
-0.13095238095238096 x 100 = -13.1%