Final answer:
The patient's age of 25 1/2 years is converted to months by multiplying the years by 12 and accounting for the additional half-year. This calculation results in an age of 306 months.
Step-by-step explanation:
To calculate the age of the patient in months, we need to convert the years into months. Since there are 12 months in a year, we can multiply the number of years by 12 to get the age in months. In addition, we need to account for the half-year mentioned.
The patient is 25 1/2 years old, which means he is 25 years plus another half a year. First, we calculate the number of months in 25 years:
- 25 years × 12 months/year = 300 months
Next, we add the additional half a year in months:
- 1/2 year × 12 months/year = 6 months
Finally, we add the 300 months (from the 25 years) to 6 months (from the half year) to get the total age in months:
- 300 months + 6 months = 306 months
Therefore, the patient is 306 months old, which corresponds to option C).