[tex] \frac{15}{7} \times \frac{1}{18} = \frac{5}{7} \times \frac{1}{6} = \frac{5}{42} [/tex]
[tex] \frac{1}{9} \times \frac{3}{10} = \frac{1}{3} \times \frac{1}{10} = \frac{1}{30} [/tex]
[tex] \frac{4}{5} \times \frac{9}{8} = \frac{1}{5} \times \frac{9}{2} = \frac{9}{10} [/tex]
[tex] \frac{7}{8} \times \frac{2}{31} = \frac{7}{4} \times \frac{1}{31} = \frac{7}{124} [/tex]
[tex] \frac{9}{43} \times \frac{5}{21} = \frac{3}{43} \times \frac{5}{7} = \frac{15}{301} [/tex]
[tex] \frac{7}{45} \times \frac{15}{28} = \frac{1}{3} \times \frac{1}{4} = \frac{1}{12} [/tex]
