-51.19% is the change from 799 to 390
Calculation steps:
[( 390 - 799 ) ÷ 799] x 100 = -51.19%
Formula
Percentage change = [(390 - 799) / 799] x 100
Subtract the new number by the original number
390 - 799 = -409
-409 ÷ 799 = -0.5118898623279099
-0.5118898623279099 x 100 = -51.19%