Now, if K is less than one, that means this denominator is larger than our enumerator. And that means we have more concentration of reactants of these guys at equilibrium than of our products than these guys. And that means our reaction is not product favorite, it's not spontaneous, in fact it's reactant favorite. This reaction is spontaneous, but this reaction isn't if our K is less than one. And that's the meaning of K. Now, a few more important things that I want to mention about equilibrium constants. Now an equilibrium constant is unitless.