\(\dfrac{12}{13}=\dfrac{12x14}{13x14}=\dfrac{168}{182}\)
\(\dfrac{13}{14}=\dfrac{13x13}{14x13}=\dfrac{169}{182}\)
\(\dfrac{12}{13}\) và \(\dfrac{13}{14}\)
Ta có : \(12\times14=168\)
\(13\times13=169\)
Mà \(168< 169\) Nên : \(\dfrac{12}{13}< \dfrac{13}{14}\)