Predicting the extent of reaction

For the following reaction,

$\mathrm{M}+2\mathrm{N}\rightleftharpoons 3\mathrm{P}$‍,
the equilibrium constant is $3$‍.

At a particular time, the concentration of $\mathrm{M}$‍ and $\mathrm{N}$‍ is $0.3\mathrm{M}$‍ while that of $\mathrm{P}$‍ is $0.6\mathrm{M}$‍.