-97.43% is the change from 583 to 15
Calculation steps:
[( 15 - 583 ) ÷ 583] x 100 = -97.43%
Formula
Percentage change = [(15 - 583) / 583] x 100
Subtract the new number by the original number
15 - 583 = -568
-568 ÷ 583 = -0.9742710120068611
-0.9742710120068611 x 100 = -97.43%