-81.8% is the change from 489 to 89
Calculation steps:
[( 89 - 489 ) ÷ 489] x 100 = -81.8%
Formula
Percentage change = [(89 - 489) / 489] x 100
Subtract the new number by the original number
89 - 489 = -400
-400 ÷ 489 = -0.8179959100204499
-0.8179959100204499 x 100 = -81.8%