-98.53% is the change from 611 to 9
Calculation steps:
[( 9 - 611 ) ÷ 611] x 100 = -98.53%
Formula
Percentage change = [(9 - 611) / 611] x 100
Subtract the new number by the original number
9 - 611 = -602
-602 ÷ 611 = -0.9852700490998363
-0.9852700490998363 x 100 = -98.53%