-17.12% is the change from 812 to 673
Calculation steps:
[( 673 - 812 ) ÷ 812] x 100 = -17.12%
Formula
Percentage change = [(673 - 812) / 812] x 100
Subtract the new number by the original number
673 - 812 = -139
-139 ÷ 812 = -0.17118226600985223
-0.17118226600985223 x 100 = -17.12%