-98.53% is the change from 612 to 9
Calculation steps:
[( 9 - 612 ) ÷ 612] x 100 = -98.53%
Formula
Percentage change = [(9 - 612) / 612] x 100
Subtract the new number by the original number
9 - 612 = -603
-603 ÷ 612 = -0.9852941176470589
-0.9852941176470589 x 100 = -98.53%