ANSWER
[tex]\frac{31}{7}[/tex]EXPLANATION
An improper fraction is a fraction that has a numerator that is greater than the denominator.
To write the fraction as an improper fraction, multiply 4 by 7 and add it to 3.
Then, replace the numerator with that number:
[tex]\begin{gathered} \Rightarrow4\frac{3}{7}=\frac{(4\cdot7)+3}{7}=\frac{28+3}{7} \\ \Rightarrow\frac{31}{7} \end{gathered}[/tex]That is the answer.