A company is financed as follows:

   • 400 million $1 shares quoted at $3.00 each.

   • $800 million 5% bonds quoted at par.

The company plans to raise $200 million long term debt to finance a project with a net present value of $100 million.

The bank that is providing the debt is insisting on a maximum gearing level covenant.  

Gearing will be based on market values and calculated as debt/(debt + equity).

What is the lowest figure for the gearing covenant that the bank could impose without the company breaching the agreement?