-4.97% is the change from 503 to 478
Calculation steps:
[( 478 - 503 ) ÷ 503] x 100 = -4.97%
Formula
Percentage change = [(478 - 503) / 503] x 100
Subtract the new number by the original number
478 - 503 = -25
-25 ÷ 503 = -0.04970178926441352
-0.04970178926441352 x 100 = -4.97%