-4.57% is the change from 503 to 480
Calculation steps:
[( 480 - 503 ) ÷ 503] x 100 = -4.57%
Formula
Percentage change = [(480 - 503) / 503] x 100
Subtract the new number by the original number
480 - 503 = -23
-23 ÷ 503 = -0.04572564612326044
-0.04572564612326044 x 100 = -4.57%