Given:
[tex]\frac{9}{10}+\frac{2}{5}[/tex]Add the fractions by using L.C.M.
[tex]\begin{gathered} \frac{9}{10}+\frac{2}{5}=\frac{9}{10}+\frac{4}{10} \\ =\frac{13}{10} \\ \text{Thus, }\frac{9}{10}+\frac{2}{5}\text{ is }\frac{13}{10}. \end{gathered}[/tex]