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Formula
Find the difference
$\left( + \dfrac{ 5 }{ 6 } \right) - \left( + \dfrac{ 3 }{ 4 } \right)$
$\dfrac { 1 } { 12 }$
Find the difference
$\dfrac { 5 } { \color{#FF6800}{ 6 } } - \dfrac { 3 } { \color{#FF6800}{ 4 } }$
 The smallest common multiple in denominator is $12$
$\dfrac { 5 } { \color{#FF6800}{ 6 } } - \dfrac { 3 } { \color{#FF6800}{ 4 } }$
$\dfrac { 5 } { 6 } - \dfrac { 3 } { 4 }$
 Multiply the denominator and the numerator so that the denominator is the smallest common multiple 
$\dfrac { 5 \times \color{#FF6800}{ 2 } } { 6 \times \color{#FF6800}{ 2 } } - \dfrac { 3 \times \color{#FF6800}{ 3 } } { 4 \times \color{#FF6800}{ 3 } }$
$\color{#FF6800}{ \dfrac { 5 \times 2 } { 6 \times 2 } } \color{#FF6800}{ - } \color{#FF6800}{ \dfrac { 3 \times 3 } { 4 \times 3 } }$
 Organize the expression 
$\color{#FF6800}{ \dfrac { 10 } { 12 } } \color{#FF6800}{ - } \color{#FF6800}{ \dfrac { 9 } { 12 } }$
$\color{#FF6800}{ \dfrac { 10 } { 12 } } \color{#FF6800}{ - } \color{#FF6800}{ \dfrac { 9 } { 12 } }$
 Since the denominator is the same as $12$ , combine the fractions into one 
$\color{#FF6800}{ \dfrac { 10 - 9 } { 12 } }$
$\dfrac { \color{#FF6800}{ 10 } \color{#FF6800}{ - } \color{#FF6800}{ 9 } } { 12 }$
 Subtract $9$ from $10$
$\dfrac { \color{#FF6800}{ 1 } } { 12 }$
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