calculate Return on shareholders equity

The following financial statements of Thermitrex (Pty) Ltd in Dunswart Industrial Area Johannesburg are provided to you: QUITY AND LIABIUTIES STATEMENT OF COMPREHENSIVE INCOME \begin{tabular}{l|r|} \multicolumn{2}{c}{ FOR THE YEAR ENDED 31 DECEMBER 2021} \\ \hline & \\ \hline Revenue & 2450.000 \\ \hline Cost of sales and services rendered & (1450000) \\ \hline Gross profit & 1000000 \\ \hline Operating expenses & (250000) \\ \hline Operating profit & 750000 \\ \hline Investment income & 80000 \\ \hline Finance cost & (65000) \\ \hline Profit before tax & 765000 \\ \hline Income tax expense & (306000) \\ \hline Profit after tax & 459000 \\ \hline Preference share dividends & (15750) \\ \hline Attributable earnings & 443250 \\ \hline Ordinary dividends & (150000) \\ \hline Retained earnings (for the year) & 293250 \\ \hline \end{tabular}