$$5/6$$ and $$7/9$$
Here the LCM of $$6$$ and $$9$$ is $$18$$
$$5/6 = \left(5 \times 3 \right)/\left(6 \times 3 \right) = 15/18$$
$$7/9 = \left(7 \times 2 \right)/\left(9 \times 2 \right) = 14/18$$
Therefore, $$15/18$$ and $$14/18$$ are the required fractions.