Marshall Networks, Inc. has a total asset turnover of $2\mathrm{.}5$ and a net profit margin of $3\mathrm{.}5\%.$ The firm has a return on equity of $17\mathrm{.}5\%.$ Calculate Marshall's debt ratio.

Seleccione una:

a$.30\%$

b$.40\%$

C$.50\%$

d$.60\%$