[tex]1.\rightarrow \frac{68}{5}=13.6\\\\2.\frac{50}{4}=12.50\\\\3.\frac{45}{7}=6.42857142857..........\\\\=6.\overline{428571}\\\\4.\frac{31}{3}=10.33333....\\\\=10.\overline{3}[/tex]
Decimal expansion of fraction will be terminating if denominator of the fraction is of the form [tex]2^a,\tex{or},5^{b},\tex{or} 2^a \times 5^b[/tex], otherwise it is non terminating repeating.
