-98.13% is the change from 480 to 9
Calculation steps:
[( 9 - 480 ) ÷ 480] x 100 = -98.13%
Formula
Percentage change = [(9 - 480) / 480] x 100
Subtract the new number by the original number
9 - 480 = -471
-471 ÷ 480 = -0.98125
-0.98125 x 100 = -98.13%