$\frac {2}{9}÷\frac {3}{4}÷\frac {2}{5}$
$=\frac {2}{9}×\frac {4}{3}×\frac {5}{2}$
$=\frac {8}{27}×\frac {5}{2}$
$=\frac {20}{27}$
$\frac {19}{26}÷\frac {38}{55}×\frac {5}{11}$
$=\frac {19}{26}×\frac {55}{38}×\frac {5}{11}$
$=\frac {55}{52}×\frac {5}{11}$
$=\frac {25}{52}$