-16.91% is the change from 810 to 673
Calculation steps:
[( 673 - 810 ) ÷ 810] x 100 = -16.91%
Formula
Percentage change = [(673 - 810) / 810] x 100
Subtract the new number by the original number
673 - 810 = -137
-137 ÷ 810 = -0.16913580246913582
-0.16913580246913582 x 100 = -16.91%