$\frac{ 273 }{ 10 }-12 \frac{ 5 }{ 9 }$
Convert the mixed number to an improper fraction$\frac{ 273 }{ 10 }-\frac{ 113 }{ 9 }$
Subtract the fractions$\begin{align*}&\frac{ 1327 }{ 90 } \\&\begin{array} { l }14 \frac{ 67 }{ 90 },& 14.7\overset{ \cdot }{ 4 } \end{array}\end{align*}$