if a = -7 and b= 8 and c= 82 and d= -20 what does a/c + b/d = ?

$${\frac{{\mathtt{a}}}{{\mathtt{c}}}}{\mathtt{\,\small\textbf+\,}}{\frac{{\mathtt{b}}}{{\mathtt{d}}}}$$

insert the values for a, b, c and d

$${\mathtt{\,-\,}}{\frac{{\mathtt{7}}}{{\mathtt{82}}}}{\mathtt{\,-\,}}{\frac{{\mathtt{8}}}{{\mathtt{20}}}} = {\mathtt{\,-\,}}{\frac{{\mathtt{199}}}{{\mathtt{410}}}} = -{\mathtt{0.485\: \!365\: \!853\: \!658\: \!536\: \!6}}$$