The given ratio is,
[tex]\frac{12}{10}[/tex]Taking 2 as common from both 12 and 10 we have,
[tex]\frac{12}{10}=\frac{6\times2}{5\times2}=\frac{6}{5}[/tex]As there is no common factor between 6 and 5. it cannot be simplified further as fraction.
Thus, the answer is 6/5