First we would Calculate value of reaction quotient ( Qc ) using given Concentrations of each molecule.
Then we would compare it with Kc value as :
1.) If , Kc = Qc ,then reaction is at Equilibrium.
2.) If Qc > Kc , this means products are more , so reaction proceed in backward direction to consume products and produce reactants.
3.) If , Qc < Kc , this means products are less , so reaction proceed in forward direction to produce products and consume reactants.