Impact of Decreasing Reactant Concentration on Equilibrium

Consider the reversible reaction:

A + B <=> C + D

At equilibrium, the concentrations of the reactants (A and B) and the products (C and D) remain constant. The equilibrium constant (K) for this reaction is defined as:

K = [C][D] / [A][B]

If the concentration of A is decreased while keeping other conditions constant, what will happen to the equilibrium position of the reaction?