-13.72% is the change from 583 to 503
Calculation steps:
[( 503 - 583 ) ÷ 583] x 100 = -13.72%
Formula
Percentage change = [(503 - 583) / 583] x 100
Subtract the new number by the original number
503 - 583 = -80
-80 ÷ 583 = -0.137221269296741
-0.137221269296741 x 100 = -13.72%