-39.31% is the change from 809 to 491
Calculation steps:
[( 491 - 809 ) ÷ 809] x 100 = -39.31%
Formula
Percentage change = [(491 - 809) / 809] x 100
Subtract the new number by the original number
491 - 809 = -318
-318 ÷ 809 = -0.3930778739184178
-0.3930778739184178 x 100 = -39.31%