[tex]\displaystyle 2 \frac{5}{6} = \frac{17}{6} =2,8(3) \\ \\ -4 \frac{3}{5} =- \frac{23}{5} =-4,6 \\ \\ 3 \frac{2}{7} = \frac{23}{7}= 3,(285714) \\ \\ 1\frac{5}{8} = \frac{13}{8} =1,625 \\ \\ - \frac{5}{9} =-0,(5) \\ \\ 3 \frac{16}{99} = \frac{313}{99} =3,(16) \\ \\ \frac{13}{45} =0,2(8)[/tex]