Final answer:
The improper fraction for 12/3 is 4.
Step-by-step explanation:
To convert a fraction to an improper fraction, we need to divide the numerator by the denominator. In this case, 12 divided by 3 is equal to 4. Therefore, the improper fraction for 12/3 is 4/1 or simply 4.
Learn more about Improper fractions