Information relating to equity of National Treasure Ltd is shown below.

Profit for the year to 30 June 2014, 684 500

Ordinary dividends paid during the year, 105 000

Retained Earnings at 1 July 2013, 1 648 390

Ordinary shareholders’ equity at 30 June 2014, 1 500 000

Preference dividends paid during the year, 100 000

National Treasure’s ordinary shareholders’ equity is the same as at 30 June 2013.

What is National Treasure’s return on shareholders’ equity?