The solubility of sodium bicarbonate in water is 11.1 g NaHCO3/l0O g H2O at 30°C and 16.4 g NaHCO3/100 g H20 at 60°C. If a saturated solution of NaHCO3 at 60°C is cooled and comes to equilibrium at 30°C, what percentage of the dissolved salt crystallizes?