-51.97% is the change from 812 to 390
Calculation steps:
[( 390 - 812 ) ÷ 812] x 100 = -51.97%
Formula
Percentage change = [(390 - 812) / 812] x 100
Subtract the new number by the original number
390 - 812 = -422
-422 ÷ 812 = -0.5197044334975369
-0.5197044334975369 x 100 = -51.97%