-88.68% is the change from 583 to 66
Calculation steps:
[( 66 - 583 ) ÷ 583] x 100 = -88.68%
Formula
Percentage change = [(66 - 583) / 583] x 100
Subtract the new number by the original number
66 - 583 = -517
-517 ÷ 583 = -0.8867924528301887
-0.8867924528301887 x 100 = -88.68%