Write 3 3/5 as an improper fraction.

To convert a mixed number to an improper fraction, we follow these steps:

1. Multiply the whole number by the denominator.
2. Add the numerator to the product obtained in step 1.
3. Write the sum obtained in step 2 over the denominator.

In this case, we have:

Whole number: 3
Numerator: 3
Denominator: 5

1. 3 x 5 = 15
2. 15 + 3 = 18
3. The improper fraction is 18/5.