-0.79% is the change from 504 to 500
Calculation steps:
[( 500 - 504 ) ÷ 504] x 100 = -0.79%
Formula
Percentage change = [(500 - 504) / 504] x 100
Subtract the new number by the original number
500 - 504 = -4
-4 ÷ 504 = -0.007936507936507936
-0.007936507936507936 x 100 = -0.79%