-39.56% is the change from 809 to 489
Calculation steps:
[( 489 - 809 ) ÷ 809] x 100 = -39.56%
Formula
Percentage change = [(489 - 809) / 809] x 100
Subtract the new number by the original number
489 - 809 = -320
-320 ÷ 809 = -0.39555006180469715
-0.39555006180469715 x 100 = -39.56%