The formula in changing the improper fraction to a mixed fraction is just dividing.
18/5
Divide 18 to 5. It's 3 remainder 3. The quotient 3 will be the whole number, the remainder 3 will be the numerator.
3 3/?
Just copy the denominator...
3 3/5
3 3/5 is the mixed fraction of 18/5.
