Respuesta:
[tex]a. \: \frac{2}{3} \times \frac{10}{6} \times \frac{3}{4} = \frac{20}{18} \times \frac{3}{4} = \frac{60}{72} = \frac{5}{6} [/tex]
[tex]b. \: \frac{5}{3} \times \frac{4}{5} = \frac{20}{15} = \frac{1}{3} [/tex]
[tex]c. \: \frac{3}{7} \times \frac{7}{4} = \frac{21}{28} = \frac{3}{4} [/tex]
d. 1/9 x 7/9 x 4/4 = 1/9 x 7/9 = 7/54 x 4/4 = 28/216 = 7/54
