Compare the fractions 5/6 and 7/9.

Solution: L.C.M. of 6 and 9 = 3 * 2 * 3 = 18

Therefore, 5/6 = (5 * 3) / (6 * 3) = 15 / 18

and, 7/9 = (7 * 2) / (9 * 2) = 14 / 18

Clearly, 15 / 18 > 14 / 18

Hence, 5/6 > 7/9 .