$\text{Đáp án:}$
Cách 1: Quy đồng mẫu số:
$\dfrac{8}{7}$$=$ $\dfrac{8×8}{7×8}$ $\dfrac{64}{52}$
$\dfrac{7}{8}$$=$ $\dfrac{7×7}{8×7}$ $\dfrac{49}{52}$
Vì $\dfrac{64}{52}$ $>$ $\dfrac{49}{52}$ nên $\dfrac{8}{7}$ $>$ $\dfrac{7}{8}$
Cách 2: So sánh với 1
Ta có: $\dfrac{8}{7}$ $>$ `1` ; $\dfrac{7}{8}$ $<$ `1`
⇒ $\dfrac{8}{7}$ $>$ $\dfrac{7}{8}$