-17.83% is the change from 819 to 673
Calculation steps:
[( 673 - 819 ) ÷ 819] x 100 = -17.83%
Formula
Percentage change = [(673 - 819) / 819] x 100
Subtract the new number by the original number
673 - 819 = -146
-146 ÷ 819 = -0.17826617826617827
-0.17826617826617827 x 100 = -17.83%