Answer:
Using estimation with compatible numbers the solution is;
[tex]\frac{1}{2}[/tex]Explanation:
We want to estimate the fraction below with compatible numbers.
[tex]\begin{gathered} \frac{7}{7}-\frac{2}{5} \\ \frac{7}{7}=1 \\ \frac{2}{5}\approx\frac{1}{2} \end{gathered}[/tex]So, by estimation the fraction becomes;
[tex]\begin{gathered} 1-\frac{1}{2} \\ =\frac{1}{2} \end{gathered}[/tex]Using estimation with compatible numbers the solution is;
[tex]\frac{1}{2}[/tex]