a)
[tex] \frac{2}{7} \times \frac{11}{3} = \frac{22}{21} [/tex]
b)
[tex] \frac{9}{5} \times \frac{3}{4} = \frac{27}{20} [/tex]
c)
[tex] \frac{7}{5} + \frac{3}{10} = \frac{7 \times 2}{5 \times 2} + \frac{3}{10} = \frac{14}{10} + \frac{3}{10} = \frac{17}{10} [/tex]
d)
[tex] \frac{7}{5} \times \frac{3}{10} = \frac{21}{50} [/tex]
