$\left( 1+3 \right)+\left( \frac{ 1 }{ 9 }+\frac{ 5 }{ 8 } \right)$
Add the numbers$4+\left( \frac{ 1 }{ 9 }+\frac{ 5 }{ 8 } \right)$
Add the fractions$4+\frac{ 53 }{ 72 }$
Write the sum of the whole number and the fraction as a mixed number$\begin{align*}&4 \frac{ 53 }{ 72 } \\&\begin{array} { l }\frac{ 341 }{ 72 },& 4.736\overset{ \cdot }{ 1 } \end{array}\end{align*}$