$\Delta ABC$ and $\Delta DBC$ are on the same base BC.Then $\large\frac{ar\;\Delta ABC}{ar\;\Delta DBC}$=______

Question

$\begin{array}{1 1}\large\frac{AB}{DC}\\\large\frac{AB}{BC}\\\large\frac{AX}{BC}\\\large\frac{AX}{DX}\end{array} $