A Solution Is Made by Dissolving 0

A solution is made by dissolving 0.750 moles of isopropanol (C₃H₇OH) in 0.250 moles of water. What is the mass percentage of isopropanol in this mixture?
MM(C₃H₇OH) = 60.10 g/mol and Molar Mass(H₂O) = 18.02 g/mol

A) 5.51% (m/m)
B) 9.1% (m/m)
C) 75.0% (m/m)
D) 76.9% (m/m)
E) 90.9% (m/m)