-17.73% is the change from 818 to 673
Calculation steps:
[( 673 - 818 ) ÷ 818] x 100 = -17.73%
Formula
Percentage change = [(673 - 818) / 818] x 100
Subtract the new number by the original number
673 - 818 = -145
-145 ÷ 818 = -0.17726161369193155
-0.17726161369193155 x 100 = -17.73%