Answer: 2350 milligrams of sodium are recommended for the whole day.
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]
[Divide both sides by 0.20]

Hence, 2350 milligrams of sodium are recommended for the whole day.