-98.49% is the change from 597 to 9
Calculation steps:
[( 9 - 597 ) ÷ 597] x 100 = -98.49%
Formula
Percentage change = [(9 - 597) / 597] x 100
Subtract the new number by the original number
9 - 597 = -588
-588 ÷ 597 = -0.9849246231155779
-0.9849246231155779 x 100 = -98.49%