Convert all fractions to a common denominator. Here we need a denominator which is a multiple of 2, 4, and 4. So 4 sounds like a good choice of common denominator. 
$${\frac{{\mathtt{2}}}{{\mathtt{4}}}} = {\frac{{\mathtt{1}}}{{\mathtt{4}}}}{\mathtt{\,\small\textbf+\,}}{\frac{{\mathtt{5}}}{{\mathtt{4}}}}{\mathtt{\,\times\,}}{\mathtt{x}}$$
