What is 1 3/4 as an improper fraction?

To convert the mixed number 1 3/4 to an improper fraction, follow these steps:

1. Multiply the whole number by the denominator of the fraction: 1 × 4 = 4.
2. Add the result to the numerator of the fraction: 4 + 3 = 7.
3. The improper fraction is formed by placing the sum over the original denominator: 7/4.

So, 1 3/4 as an improper fraction is 7/4.