8.
a)
[tex]\frac{1}{3} = \frac{1\cdot3}{3\cdot3} =\frac{3}{9}\\\\\frac{4}{5} = \frac{4\cdot4}{5\cdot4} = \frac{16}{20}[/tex]
b)
[tex]\frac{5}{3} = \frac{5\cdot5}{3\cdot5} = \frac{25}{15}\\\\\frac{7}{8} = \frac{7\cdot4}{8\cdot4} = \frac{28}{32}[/tex]
c)
[tex]\frac{13}{9} = \frac{13\cdot3}{9\cdot3} = \frac{39}{27}\\\\\frac{1}{2} = \frac{1\cdot11}{2\cdot11}= \frac{11}{22}[/tex]
d)
[tex]\frac{3}{7} = \frac{3\cdot3}{7\cdot3}= \frac{9}{21}\\\\\frac{5}{3} = \frac{5\cdot4}{3\cdot4} =\frac{20}{12}[/tex]
e)
[tex]\frac{2}{3} = \frac{2\cdot5}{3\cdot5} = \frac{10}{15}\\\\\frac{8}{7} = \frac{8\cdot3}{7\cdot3} = \frac{24}{21}[/tex]
