\[\boxed{\mathbf{1009\ (1009).\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ \frac{16}{16 + 24} = \frac{16}{40} = \frac{2}{5};\ \]
\[2)\ \frac{24}{40} = \frac{3}{5};\ \]
\[3)\ 0;\]
\[4)\ \frac{40}{40} = 1.\]