In nutrition labeling, how many milligrams (mg) are equivalent to 2.4 micrograms (mcg) of vitamin B12?

• A. $2.4$ mg
• B. $0.0024$ mg
• C. $0.024$ mg
• D. $0.24$ mg

Answer: (B)

Verified step by step guidance

1. Understand the units involved: micrograms (mcg) and milligrams (mg) are both units of mass commonly used in nutrition labeling. 1 milligram (mg) is equal to 1000 micrograms (mcg).
2. Set up the conversion factor based on the relationship: \$1\ \text{mg} = 1000\ \text{mcg}$.
3. To convert micrograms to milligrams, divide the number of micrograms by 1000. This can be expressed as: \(\text{mg} = \frac{\text{mcg}}{1000}\).
4. Apply the conversion to the given value of 2.4 mcg: \(\text{mg} = \frac{2.4}{1000}\).
5. Simplify the fraction to find the equivalent amount in milligrams, which will give you the answer in mg.