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$- \dfrac { 5 } { \color{#FF6800}{ 8 } } + \dfrac { 27 } { \color{#FF6800}{ 2 } }$

$ $ The smallest common multiple in denominator is $ 8$

$- \dfrac { 5 } { \color{#FF6800}{ 8 } } + \dfrac { 27 } { \color{#FF6800}{ 2 } }$

$- \dfrac { 5 } { 8 } + \dfrac { 27 } { 2 }$

$ $ Multiply the denominator and the numerator so that the denominator is the smallest common multiple $ $

$- \dfrac { 5 } { 8 } + \dfrac { 27 \times \color{#FF6800}{ 4 } } { 2 \times \color{#FF6800}{ 4 } }$

$\color{#FF6800}{ - } \color{#FF6800}{ \dfrac { 5 } { 8 } } \color{#FF6800}{ + } \color{#FF6800}{ \dfrac { 27 \times 4 } { 2 \times 4 } }$

$ $ Organize the expression $ $

$\color{#FF6800}{ - } \color{#FF6800}{ \dfrac { 5 } { 8 } } \color{#FF6800}{ + } \color{#FF6800}{ \dfrac { 108 } { 8 } }$

$\color{#FF6800}{ - } \color{#FF6800}{ \dfrac { 5 } { 8 } } \color{#FF6800}{ + } \color{#FF6800}{ \dfrac { 108 } { 8 } }$

$ $ Since the denominator is the same as $ 8 $ , combine the fractions into one $ $

$\color{#FF6800}{ \dfrac { - 5 + 108 } { 8 } }$

$\dfrac { \color{#FF6800}{ - } \color{#FF6800}{ 5 } \color{#FF6800}{ + } \color{#FF6800}{ 108 } } { 8 }$

$ $ Add $ - 5 $ and $ 108$

$\dfrac { \color{#FF6800}{ 103 } } { 8 }$