What is 3 3/4 as an improper fraction?

To convert the mixed number 3 3/4 to an improper fraction, follow these steps:

1. Multiply the whole number by the denominator: 3 × 4 = 12.
2. Add the numerator to the result: 12 + 3 = 15.
3. The improper fraction is 15/4.

So, 3 3/4 as an improper fraction is 15/4.