A binary star consists of two stars A (mass $2.2 \mathrm{M}_{\mathrm{s}}$ ) and B (mass $11 \mathrm{M}_{\mathrm{s}}$ ), where $\mathrm{M}_{\mathrm{s}}$ is the mass of the sun. They are separated by distance d and are rotating about their centre of mass, which is stationary. The ratio of the total angular momentum of the binary star to the angular momentum of star B about the centre of mass is