A thermally insulated vessel contains some water at $0^\circ\text{C}$. The vessel is connected to a vacuum pump to pump out water vapour. This results in some water getting frozen. It is given latent heat of vaporization of water at $0^\circ\text{C} = 21 \times 10^5\,\text{J/kg}$ and latent heat of freezing of water $= 3.36 \times 10^5\,\text{J/kg}$. The maximum percentage amount of water that will be solidified in this manner will be: