$${\frac{\left({\mathtt{5}}{\mathtt{\,\small\textbf+\,}}{\frac{{\mathtt{2}}}{{\mathtt{3}}}}\right)}{{\mathtt{8}}}} = {\frac{{\mathtt{17}}}{{\mathtt{24}}}} = {\mathtt{0.708\: \!333\: \!333\: \!333\: \!333\: \!3}}$$
http://web2.0rechner.de/#(5+2/3) / (8)
$${\frac{{\mathtt{5}}{\mathtt{\,\times\,}}\left({\frac{{\mathtt{2}}}{{\mathtt{3}}}}\right)}{{\mathtt{8}}}} = {\frac{{\mathtt{5}}}{{\mathtt{12}}}} = {\mathtt{0.416\: \!666\: \!666\: \!666\: \!666\: \!7}}$$
.Da man bei Brüchen üblicherweise 5 2/3 anstatt 5 + 2/3 sagt (und schreibt), ist damit denke ich 17/3 / 8 gemeint, d.h. ca. 0,71. :)
$${\frac{\left({\mathtt{5}}{\mathtt{\,\small\textbf+\,}}{\frac{{\mathtt{2}}}{{\mathtt{3}}}}\right)}{{\mathtt{8}}}} = {\frac{{\mathtt{17}}}{{\mathtt{24}}}} = {\mathtt{0.708\: \!333\: \!333\: \!333\: \!333\: \!3}}$$
http://web2.0rechner.de/#(5+2/3) / (8)