A 1.500g sample of a mixture of solid Na₁₂PO₄ – 12H₂0 and BaC₁₂ – 2H₂O was dissolved in water and formed 0.520g of Ba₁₂(PO₄)₂ precipitate. If reagent tests demonstrated that Na3PO₄ – 12H₂0 was the limiting reactant in the precipitation reaction, calculate the mass percent of each reactant in the original sample.