-30.9% is the change from 809 to 559
Calculation steps:
[( 559 - 809 ) ÷ 809] x 100 = -30.9%
Formula
Percentage change = [(559 - 809) / 809] x 100
Subtract the new number by the original number
559 - 809 = -250
-250 ÷ 809 = -0.30902348578491967
-0.30902348578491967 x 100 = -30.9%