Answer :
The best estimate of the difference between
[tex]\begin{gathered} 4\frac{4}{9}\text{ and }\frac{4}{7} \\ is\text{ less than 4} \\ \text{The best estimate of the sum of } \\ 4\frac{4}{9}\text{ and }\frac{4}{7} \\ is\text{ 5} \end{gathered}[/tex]The correct answer is option C which is 5
When you find the difference between both numbers, the answer is 3 and a fraction.
The sum of both is 5 and a fraction