a. Quy đồng: \(BCNN\left(92,107\right)=9844\)
\(\Rightarrow\dfrac{87}{92}=\dfrac{9309}{9844};\dfrac{102}{107}=\dfrac{9384}{9844}\)
Do \(\dfrac{9309}{9844}< \dfrac{9384}{9844}\)
Vậy: \(\dfrac{87}{92}< \dfrac{102}{107}\)
b. Quy đồng: \(BCNN\left(60,17\right)=1020\)
\(\Rightarrow\dfrac{-61}{60}=\dfrac{-1037}{1020};\dfrac{16}{17}=\dfrac{960}{1020}\)
Do: \(\dfrac{-1037}{1020}< \dfrac{960}{1020}\)
Vậy: ...