+118725 The fraction calc is not working at present BUT
you can just enter it as (4+1/2)-(2+3/5)
$$\left({\mathtt{4}}{\mathtt{\,\small\textbf+\,}}{\frac{{\mathtt{1}}}{{\mathtt{2}}}}\right){\mathtt{\,-\,}}\left({\mathtt{2}}{\mathtt{\,\small\textbf+\,}}{\frac{{\mathtt{3}}}{{\mathtt{5}}}}\right) = {\frac{{\mathtt{19}}}{{\mathtt{10}}}} = {\mathtt{1.9}}$$
+118725 The fraction calc is not working at present BUT
you can just enter it as (4+1/2)-(2+3/5)
$$\left({\mathtt{4}}{\mathtt{\,\small\textbf+\,}}{\frac{{\mathtt{1}}}{{\mathtt{2}}}}\right){\mathtt{\,-\,}}\left({\mathtt{2}}{\mathtt{\,\small\textbf+\,}}{\frac{{\mathtt{3}}}{{\mathtt{5}}}}\right) = {\frac{{\mathtt{19}}}{{\mathtt{10}}}} = {\mathtt{1.9}}$$
