We can say whether the solution is saturated, unsaturated or supersaturated by knowing the concentration of the solute in the solvent and comparing it to the value of solubility as a function of temperature. We do as follows:
g KCl / g H2O = 68.4 g / 200 g = 0.342 g KCl / g H2O
Therefore, the solution is saturated.
Hope this answers the question.
