-98.16% is the change from 489 to 9
Calculation steps:
[( 9 - 489 ) ÷ 489] x 100 = -98.16%
Formula
Percentage change = [(9 - 489) / 489] x 100
Subtract the new number by the original number
9 - 489 = -480
-480 ÷ 489 = -0.9815950920245399
-0.9815950920245399 x 100 = -98.16%