-13.21% is the change from 583 to 506
Calculation steps:
[( 506 - 583 ) ÷ 583] x 100 = -13.21%
Formula
Percentage change = [(506 - 583) / 583] x 100
Subtract the new number by the original number
506 - 583 = -77
-77 ÷ 583 = -0.1320754716981132
-0.1320754716981132 x 100 = -13.21%