-98.15% is the change from 486 to 9
Calculation steps:
[( 9 - 486 ) ÷ 486] x 100 = -98.15%
Formula
Percentage change = [(9 - 486) / 486] x 100
Subtract the new number by the original number
9 - 486 = -477
-477 ÷ 486 = -0.9814814814814815
-0.9814814814814815 x 100 = -98.15%