nãy anh quy đồng hơi tó á em
\(\dfrac{23}{38}=\dfrac{23\times3}{38\times3}=\dfrac{69}{114}\)
\(\dfrac{14}{57}=\dfrac{14\times2}{57\times2}=\dfrac{28}{114}\)
\(\dfrac{23}{38}=\dfrac{23\times57}{38\times57}=\dfrac{1311}{2166}\)
\(\dfrac{14}{57}=\dfrac{14\times38}{57\times38}=\dfrac{532}{2166}\)