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Formula
Calculate the value
$\left( -2 \right) \times \left( + \dfrac{ 7 }{ 8 } \right) \div \left( +21 \right)$
$- \dfrac { 1 } { 12 }$
Calculate the value
$\color{#FF6800}{ - } 2 \times \color{#FF6800}{ \dfrac { 7 } { 8 } } \div 21$
 If you multiply negative numbers by odd numbers, move the (-) sign forward 
$\color{#FF6800}{ - } \left ( 2 \times \dfrac { 7 } { 8 } \div 21 \right )$
$- \left ( 2 \times \dfrac { 7 } { 8 } \color{#FF6800}{ \div } \color{#FF6800}{ 21 } \right )$
 Convert division to multiplication 
$- \left ( 2 \times \dfrac { 7 } { 8 } \color{#FF6800}{ \times } \color{#FF6800}{ \dfrac { 1 } { 21 } } \right )$
$- \left ( \color{#FF6800}{ 2 } \color{#FF6800}{ \times } \color{#FF6800}{ \dfrac { 7 } { 8 } } \color{#FF6800}{ \times } \color{#FF6800}{ \dfrac { 1 } { 21 } } \right )$
 Calculate the product of rational numbers 
$- \color{#FF6800}{ \dfrac { 1 } { 12 } }$
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