$\frac{ 3 }{ 4 } \times 1-\frac{ 3 }{ 4 } \times \frac{ 1 }{ 9 }$
Any expression multiplied by $1$ remains the same$\frac{ 3 }{ 4 }-\frac{ 3 }{ 4 } \times \frac{ 1 }{ 9 }$
Cancel out the greatest common factor $3$$\frac{ 3 }{ 4 }-\frac{ 1 }{ 4 } \times \frac{ 1 }{ 3 }$
Multiply the fractions$\frac{ 3 }{ 4 }-\frac{ 1 }{ 12 }$
Subtract the fractions$\begin{align*}&\frac{ 2 }{ 3 } \\&0.\overset{ \cdot }{ 6 } \end{align*}$