How to find the mass % of H2O2 in this reaction?

Question

The active agent in many hair bleaches is hydrogen peroxide. The amount of hydrogen peroxide in 17.0 g of hair bleach was determined by titration with a standard potassium permanganate solution.
2 MnO4-(aq) + 5 H2O2(aq) + 6 H+(aq) 5 O2(g) + 2 Mn2+(aq) + 8 H2O(l)

4.73X10^-3 moles of MnO4 and1.18X10^-2 moles of H2O2

Answer 1

This problem can not be solved without knowing the volume of MnO4-(aq) used. Also, the density of this hair bleach?