-50.25% is the change from 812 to 404
Calculation steps:
[( 404 - 812 ) ÷ 812] x 100 = -50.25%
Formula
Percentage change = [(404 - 812) / 812] x 100
Subtract the new number by the original number
404 - 812 = -408
-408 ÷ 812 = -0.5024630541871922
-0.5024630541871922 x 100 = -50.25%