-90.57% is the change from 583 to 55
Calculation steps:
[( 55 - 583 ) ÷ 583] x 100 = -90.57%
Formula
Percentage change = [(55 - 583) / 583] x 100
Subtract the new number by the original number
55 - 583 = -528
-528 ÷ 583 = -0.9056603773584906
-0.9056603773584906 x 100 = -90.57%