-0.99% is the change from 504 to 499
Calculation steps:
[( 499 - 504 ) ÷ 504] x 100 = -0.99%
Formula
Percentage change = [(499 - 504) / 504] x 100
Subtract the new number by the original number
499 - 504 = -5
-5 ÷ 504 = -0.00992063492063492
-0.00992063492063492 x 100 = -0.99%