Greatest Rational Number

A rational number can be represented as the ratio of two integers. You are given the following rational numbers:

- A: $\f\frac{5}{8}$

- B: $\f\frac{3}{4}$

- C: $\f\frac{7}{10}$

- D: $\f\frac{6}{9}$

- E: $\f\frac{2}{5}$

Please find the rational number that has the greatest value among the options listed.