-37.93% is the change from 812 to 504
Calculation steps:
[( 504 - 812 ) ÷ 812] x 100 = -37.93%
Formula
Percentage change = [(504 - 812) / 812] x 100
Subtract the new number by the original number
504 - 812 = -308
-308 ÷ 812 = -0.3793103448275862
-0.3793103448275862 x 100 = -37.93%