-0.79% is the change from 508 to 504
Calculation steps:
[( 504 - 508 ) ÷ 508] x 100 = -0.79%
Formula
Percentage change = [(504 - 508) / 508] x 100
Subtract the new number by the original number
504 - 508 = -4
-4 ÷ 508 = -0.007874015748031496
-0.007874015748031496 x 100 = -0.79%