-51.54% is the change from 813 to 394
Calculation steps:
[( 394 - 813 ) ÷ 813] x 100 = -51.54%
Formula
Percentage change = [(394 - 813) / 813] x 100
Subtract the new number by the original number
394 - 813 = -419
-419 ÷ 813 = -0.5153751537515375
-0.5153751537515375 x 100 = -51.54%