What is the packing factor for a metallic powder that is pre

What is the packing factor for a metallic powder that is pressed into an open die and pressed to 75% of its initial volume, and that after sintering with shrinkage of 4% the sintered part had a density of 90% of the solid material?

(Hint: Packing factor = density of part / density of solid material = volume of solid   material/volume of part)

Solution

Packing factor = density of part / density of solid material

density of part = 0.9 x density of solid material

Packing factor = 0.9 x density of solid material / density of solid material = 0.9