$\text{a)}1\frac{2}{5}=1,4$  

$\text{b)}\frac{1563}{60}=26,05$  

$\text{c)}\frac{5}{12}=41666\dots =0,41\left(6\right)$  

$\text{d)}-2\frac{2}{11}=-2,181818\dots =-2,\left(18\right)$  

$\text{e)}3\frac{4}{7}=3,571428571428\dots =3,\left(571428\right)$  

$\text{f)}-8\frac{5}{24}=-8,208333\dots =-8,208\left(3\right)$