-96.32% is the change from 489 to 18
Calculation steps:
[( 18 - 489 ) ÷ 489] x 100 = -96.32%
Formula
Percentage change = [(18 - 489) / 489] x 100
Subtract the new number by the original number
18 - 489 = -471
-471 ÷ 489 = -0.9631901840490797
-0.9631901840490797 x 100 = -96.32%