Final answer:
To calculate the amount of ferrous fumarate needed for 100 mg of elemental iron, with ferrous fumarate having 33% iron content, you divide 100 mg by 0.33, resulting in approximately 303 mg of ferrous fumarate.
Step-by-step explanation:
To find out how many milligrams of ferrous fumarate are required to provide 100 mg of elemental iron, where ferrous fumarate contains 33% elemental iron, we need to use a simple proportion.
First, express the percentage as a decimal, which is 0.33 for 33%. Then set up the equation using the proportion of elemental iron to ferrous fumarate:
Elemental Iron (mg) = Ferrous Fumarate (mg) × Elemental Iron Percentage
100 mg = Ferrous Fumarate (mg) × 0.33
To solve for the quantity of ferrous fumarate needed, divide the amount of elemental iron required by the decimal equivalent of the percentage:
Ferrous Fumarate (mg) = 100 mg / 0.33
When you perform the division, you get approximately 303.03 mg of ferrous fumarate.
Therefore, to obtain 100 mg of elemental iron, approximately 303 mg of ferrous fumarate would be required.