So sánh
a) \(\dfrac{17}{30}\)và \(\dfrac{51}{92}\)
b) \(-\dfrac{45}{47}\)và \(\dfrac{31}{-30}\)
c) \(\dfrac{22}{67}\)và \(\dfrac{51}{152}\)
d) \(-\dfrac{17}{39};\dfrac{18}{-39}\)và \(-\dfrac{17}{41}\)
e) \(\dfrac{42}{-37}\)và \(-\dfrac{56}{43}\)