To convert the mixed number 1 1/2 to an improper fraction, follow these steps:
1. Multiply the whole number by the denominator of the fraction: 1 × 2 = 2.
2. Add the numerator to the result: 2 + 1 = 3.
3. The improper fraction is the result over the original denominator: 3/2.
So, 1 1/2 as an improper fraction is 3/2.