2 3/4 - 1/2 =

1. Convert 2 3/4 to an improper fraction: (2*4 + 3)/4 = 11/4.
2. Find a common denominator for 11/4 and 1/2, which is 4. Convert 1/2 to 2/4.
3. Subtract the fractions: 11/4 - 2/4 = 9/4. Convert back to a mixed number: 2 1/4.