$\dfrac{7}{4}\times\dfrac{35}{15}$ =

$\dfrac{-7}{11}\times\dfrac{-5}{3}$ =

$\dfrac{4}{77}\times 10$ =

$15 \times\dfrac{6}{45}$ =

$21 \times\dfrac{11}{-77}$ =

$\dfrac{7}{8}\times\dfrac{10}{6}$ =

$\dfrac{3}{2}\times\dfrac{3}{13}$ =

$\dfrac{1}{19}\times\dfrac{23}{2}$ =

$\dfrac{1}{5}\times\dfrac{23}{2}$ =

$\dfrac{4}{6}\times\dfrac{5}{7}$ =