To divide fractions, multiply the dividend by the reciprocal of the divisor.
[tex]12 * \frac{5}{4} = \frac{60}{4} = 15[/tex]
[tex] \frac{3}{4}* \frac{8}{7} = \frac{24}{28} = \frac{6}{7} [/tex]
[tex]8* \frac{7}{6} = \frac{56}{6} = \frac{28}{3} [/tex]
[tex] \frac{8}{11} * \frac{7}{4} = \frac{56}{44} = \frac{14}{11} [/tex]
[tex]4* \frac{7}{5} = \frac{28}{5} [/tex]
[tex] \frac{3}{4} * \frac{12}{1} = \frac{36}{4} = 9[/tex]