To convert $12 \frac{1}{4}$ into a decimal:

1. Keep the whole number part as it is: $12$.
2. Convert the fraction $\frac{1}{4}$ to a decimal. $\frac{1}{4} = 0.25$
3. Add the decimal to the whole number: $12 + 0.25 = 12.25$

So, $12 \frac{1}{4}$ as a decimal is 12.25.

Would you like more details on this conversion or have any other questions?

Here are 5 related questions to explore:

1. How do you convert $5 \frac{3}{8}$ into a decimal?
2. What is $7 \frac{5}{6}$ as a decimal?
3. How do you convert repeating decimals into fractions?
4. How do you add mixed numbers?
5. How do you subtract mixed numbers?

Tip: To convert fractions to decimals quickly, divide the numerator by the denominator!