Answer :

[tex]\dfrac{3}{5}\cdot3\dfrac{3}{4}=\\ \dfrac{3}{5}\cdot\dfrac{15}{4}=\\ 3\cdot\dfrac{3}{4}=\\ \dfrac{9}{4}[/tex]
3/5 times 3 3/4 gives you 2 1/4 or  9/4