While conducting the dryness fraction test with a throttling calorimeter, it was found that the entering steam was at a pressure of 12 bar and a sample after being reduced to \(1 \mathrm{bar}\) in the calorimeter was at a temperature of \(120^{\circ} \mathrm{C}\). Estimate the dryness fraction of steam assuming \(c_{p s}=2.1 \mathrm{~kJ} / \mathrm{kg} . \mathrm{K}\).