-19.63% is the change from 489 to 393
Calculation steps:
[( 393 - 489 ) ÷ 489] x 100 = -19.63%
Formula
Percentage change = [(393 - 489) / 489] x 100
Subtract the new number by the original number
393 - 489 = -96
-96 ÷ 489 = -0.19631901840490798
-0.19631901840490798 x 100 = -19.63%