\(=\dfrac{15}{30}.\dfrac{51}{17}=\dfrac{15.51}{30.17}=\dfrac{3}{2}\)
\(\dfrac{15}{30}:\dfrac{17}{51}=\dfrac{15}{30}x\dfrac{51}{17}=\dfrac{3}{2}\)
\(\dfrac{15}{30}\):\(\dfrac{17}{51}\) =\(\dfrac{15}{30}\)x\(\dfrac{51}{17}\)=\(\dfrac{3}{2}\) nhớ tick nha!!hok tút