The reusable booster rockets of the U.S. space shuttle use a mixture of aluminum and ammonium perchlorate

Question:

The reusable booster rockets of the U.S. space shuttle use a mixture of aluminum and ammonium perchlorate for fuel. A possible equation for this reaction is
3Al(s) + 3NH4ClO4(s) → Al2O3(s) + AlCl3(s) + 3NO(g) + 6H2O(g)
What mass of NH4ClO4 should be used in the fuel mixture for every kilogram of Al?