Rút gọn phân số: \(\Large \dfrac{9}{27}\) \(\Large \dfrac{27}{31}\) \(

Rút gọn phân số:

• A.

  \(\Large \dfrac{9}{27}\)

• B.

  \(\Large \dfrac{27}{31}\)

• C.

  \(\Large \dfrac{9}{30}\)

• D.

  \(\Large \dfrac{31}{9}\)

\(\Large \dfrac{279}{81} =  \dfrac{279 : 9}{81 : 9} =  \dfrac{31}{9}\)