\(\dfrac{72}{-73}=-0,98\)
\(\dfrac{98}{-99}=-0,98\)
\(\Rightarrow\dfrac{72}{-73}=\dfrac{98}{-99}\)
\(\dfrac{72}{-73}=\dfrac{-72}{73}=1-\dfrac{1}{73}\)
\(\dfrac{98}{-99}=\dfrac{-98}{99}=1-\dfrac{1}{99}\)
mà \(-\dfrac{1}{73}< -\dfrac{1}{99}\)
nên \(\dfrac{72}{-73}>\dfrac{98}{-99}\)