`(7)/(18)`+`(5)/(3)`x1`(3)/(9):`(55)/(4)`

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1.    $\dfrac{7}{18}+$ $\dfrac{5}{3}$ x $1\dfrac{3}{9}:$ $\dfrac{55}{4}$ 

   = $\dfrac{7}{18}+$ $\dfrac{5}{3}$ x $\dfrac{4}{3}:$ $\dfrac{55}{4}$

   ${=}$ $\dfrac{7}{18}+$ $\dfrac{20}{9}:$ $\dfrac{55}{4}$

   $=\dfrac{7}{18}+$ $\dfrac{16}{99}$

   ${=}$ $\dfrac{693}{1782}+$ $\dfrac{288}{1782}$

   ${=}$ $\dfrac{981}{1782}=$ $\dfrac{109}{198}$

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2. `17/18 + 5/3 ×` 1 ` 3/9 : 55/4` 

   `=17/18 + 5/3 × 12/9 : 55/4`

   `=17/18 + 5/3 × 48/495`

   `=17/18 + 5/3 ×16/165`

   `=17/18 + 80/495`

   `=8415/8910 + 1360/8910`

   `=9775/0910`

   `=1955/1782`

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