-9.64% is the change from 809 to 731
Calculation steps:
[( 731 - 809 ) ÷ 809] x 100 = -9.64%
Formula
Percentage change = [(731 - 809) / 809] x 100
Subtract the new number by the original number
731 - 809 = -78
-78 ÷ 809 = -0.09641532756489493
-0.09641532756489493 x 100 = -9.64%