To convert a mixed fraction to an improper fraction (top-heavy), follow these steps: 1. Multiply the whole number part by the number in the denominator. So 6x9 = 54.
2. Add this result to the number in the numerator. So, 54+3 = 57.
3. Write the result of the addition as the the numerator and keep the original denominator. For example, 57/9
4. Check to see if the fraction can be simplified. Here, we can divide both the numerator and the denominator by 3 to get 19/3
Hence, 6 3/9 as an improper fraction is 19/3