Answer: 2350 milligrams of sodium are recommended for the whole day.
Step-by-step explanation:
Let x= Quantity of sodium are recommended for the whole day.
As per given, we have
20% of x = 470 milligrams
⇒ 0.20x = 470 milligrams [20%=0.20]
[tex]\Rightarrow\ x=\dfrac{470}{0.20}[/tex] [Divide both sides by 0.20]
[tex]\Rightarrow\ x= 2350[/tex]
Hence, 2350 milligrams of sodium are recommended for the whole day.