-90.91% is the change from 594 to 54
Calculation steps:
[( 54 - 594 ) ÷ 594] x 100 = -90.91%
Formula
Percentage change = [(54 - 594) / 594] x 100
Subtract the new number by the original number
54 - 594 = -540
-540 ÷ 594 = -0.9090909090909091
-0.9090909090909091 x 100 = -90.91%