[tex]b) \frac{12}{13} \times \frac{39}{4} = 9 \\ [/tex]
[tex]d) \frac{3}{4} \times \frac{40}{21} = \frac{10}{7} [/tex]
[tex]f) \frac{18}{13} \times \frac{1}{6} = \frac{3}{13 } \\ h) \frac{5}{2} \times \frac{1}{5} = \frac{1}{2} [/tex]
[tex]i) \frac{49}{5} \times \frac{3 }{14} = \frac{49}{30} [/tex]
