Answer: 55/17
Step-by-step explanation: To write a mixed number as an improper fraction, first multiply the denominator by the whole number, then add the numerator.
So here we multiply the denominator (17) by the whole number (3), then we add the numerator which is 4.
Finally, we put our new number over our old denominator and we have our answer 55/17.
Therefore, 3 and 4/17 can be rewritten as the improper fraction 55/17.