$ \frac{1}{2}=\frac{1×5}{2×5}=\frac{5}{10}$
$\frac{1}{5}=\frac{1×2}{5×2}=\frac{2}{10}$
$\frac{4}{5}=\frac{4×2}{5×2}=\frac{8}{10}$
$\frac{7}{10}=\frac{7}{10}$
$\frac{3}{10}=\frac{3×3}{10×3}=\frac{9}{30}$
$\frac{4}{15}=\frac{4×2}{15×2}=\frac{8}{30}$
$\frac{3}{8}=\frac{3×7}{8×7}=\frac{21}{56}$
$\frac{5}{7}=\frac{5×8}{7×8}=\frac{40}{56}$