-0.98% is the change from 509 to 504
Calculation steps:
[( 504 - 509 ) ÷ 509] x 100 = -0.98%
Formula
Percentage change = [(504 - 509) / 509] x 100
Subtract the new number by the original number
504 - 509 = -5
-5 ÷ 509 = -0.009823182711198428
-0.009823182711198428 x 100 = -0.98%