-16.81% is the change from 809 to 673
Calculation steps:
[( 673 - 809 ) ÷ 809] x 100 = -16.81%
Formula
Percentage change = [(673 - 809) / 809] x 100
Subtract the new number by the original number
673 - 809 = -136
-136 ÷ 809 = -0.1681087762669963
-0.1681087762669963 x 100 = -16.81%