-51.49% is the change from 804 to 390
Calculation steps:
[( 390 - 804 ) ÷ 804] x 100 = -51.49%
Formula
Percentage change = [(390 - 804) / 804] x 100
Subtract the new number by the original number
390 - 804 = -414
-414 ÷ 804 = -0.5149253731343284
-0.5149253731343284 x 100 = -51.49%