6. It is known that the sum of three fractions is $\frac{10}{11}$, and they have the same denominator, with the ratio of their numerators being $2: 3: 4$. Therefore, the largest of these three fractions is $\qquad$ .
【Solution】Solve: $\frac{10}{11} \times \frac{4}{2+3+4}$
$$
\begin{array}{l}
=\frac{10}{11} \times \frac{4}{9} \\
=\frac{40}{99},
\end{array}
$$

Answer: The largest one among these three fractions is $\frac{40}{99}$. Therefore, the answer is: $\frac{40}{99}$.