The following table contains Michigan Corp.'s adjusted trial balance at December 31st: Cash Supplies Prepaid rent Salaries expense Equipment Service revenue Rent expense Dividends Merchandise revenue Accounts payable Common stock Retained earnings $8,000 $2,000 $4,000 $8,200 $40,000 $21,000 $10,000 $5,000 $8,000 $14,000 ? $6,200 On Michigan's balance sheet, the amount shown for Common stock would make up what percentage of total stockholders' equity? (Enter the percentage as a whole number, ex: 15 not.15)