\(\Large \dfrac{20}{4}\) \(\Large \dfrac{21}{4}\) \(\Large \dfrac{23}{

• A.

  \(\Large \dfrac{20}{4}\)

• B.

  \(\Large \dfrac{21}{4}\)

• C.

  \(\Large \dfrac{23}{4}\)

• D.

  \(\Large \dfrac{4}{21}\)

Y : \(\Large \dfrac{15}{7}\) = \(\Large \dfrac{16}{5} - \dfrac{3}{4}\)

Y : \(\Large \dfrac{15}{7}\) = \(\Large \dfrac{49}{20}\)

Y = \(\Large \dfrac{49}{20} \times \dfrac{15}{7}\)

Y = \(\Large \dfrac{21}{4}\)