Question

9 3/8 : 7/12 - 5 1/4 : 7/12

Answer 1

=75/8:7/12-21/4:7/12

=(75/8-21/4):7/12

=(75/8-42/8):7/12

=33/8:7/12

=33/8.12/7

=99/14=7 1/14

Answer 2

\(=\left(9+\dfrac{3}{8}\right)\cdot\dfrac{12}{7}-\left(5+\dfrac{1}{4}\right)\cdot\dfrac{12}{7}\)

\(=\dfrac{12}{7}\left(4+\dfrac{1}{4}\right)=\dfrac{12}{7}\cdot\dfrac{17}{4}=\dfrac{51}{7}\)

Answer 3

9 3/8 : 7/12 - 5 1/4 : 7/12

\(=\dfrac{75}{8}:\dfrac{7}{12}-\dfrac{21}{4}:\dfrac{7}{12}\)

\(=\dfrac{75}{8}\times\dfrac{12}{7}-\dfrac{21}{4}\times\dfrac{12}{7}\)

\(=\dfrac{12}{7}\times\left(\dfrac{75}{8}-\dfrac{21}{4}\right)\)

\(=\dfrac{12}{7}\times\dfrac{33}{8}\)

\(=\dfrac{99}{14}\)

Answer 4

9 3/8 : 7/12 - 5 1/4 : 7/12

= 75/8 : 7/12 - 21/4 : 7/12

= 7/12 : ( 75/8 - 21/4 )

= 7/12 : ( 75/8 - 42/8 )

= 7/12 : 33/8

= 7/12 . 8/33

= 14/99.