Windsor Company is constructing a building. Construction began on February 1 and was completed on December 31. Expenditures were $1.5 million on March 1, $1.2 million on June 1, and $4 million on December 31. Windsor Company borrowed $1 million on March 1 on a five-year, 13% note to help finance the building construction. In addition, the company had outstanding all year a $2-million, five-year, 13% note payable and a $3.4-million, four-year, 18% note payable.

Calculate the appropriate capitalization rate on general borrowings that would be used for capitalization of borrowing costs. (Round answer to 2 decimal places, e.g. 52.75%.)