what is 4 x 3/5?

$${\mathtt{4}}{\mathtt{\,\times\,}}\left({\frac{{\mathtt{3}}}{{\mathtt{5}}}}\right)$$  is the same as  $${\frac{{\mathtt{4}}}{{\mathtt{1}}}}{\mathtt{\,\times\,}}\left({\frac{{\mathtt{3}}}{{\mathtt{5}}}}\right)$$ .

You multiply the top numbers together and the bottom numbers together, so its  $${\frac{{\mathtt{12}}}{{\mathtt{5}}}}$$