-18.2% is the change from 489 to 400
Calculation steps:
[( 400 - 489 ) ÷ 489] x 100 = -18.2%
Formula
Percentage change = [(400 - 489) / 489] x 100
Subtract the new number by the original number
400 - 489 = -89
-89 ÷ 489 = -0.18200408997955012
-0.18200408997955012 x 100 = -18.2%