Tungsten can also be obtained by reacting tungsten fluoride with hydrogen. The equation for this reaction is WF₆ + 3H₂ à W + 6HF. Starting with a different mass of tungsten fluoride, he calculates that the mass of tungsten formed should be 52.0 g. In his experiment he actually obtains 47.5 g of tungsten. What is the percentage yield of tungsten in this experiment?