A student determines the composition of a mixture containing only \(\text{NaCl(s)}\) and sand. The student adds excess distilled water so that all the \(\text{NaCl(s)}\) dissolves, filters the mixture, and dries the filter paper and residue to constant mass. Because the sand is insoluble, the dry residue is sand.

Measurement	Mass
Original mixture	\(12.0\text{ g}\)
Dry filter paper	\(1.00\text{ g}\)
Dry filter paper and residue	\(4.00\text{ g}\)

What is the mass percent of sand in the original mixture?