Arrange the following in descending order:
(i) 2/9, 2/3, 8/21
(ii) 1/5, 3/7, 7/10
(i) Compare 2/9, 2/3, 8/21
Convert to like fractions (denominator 63):
2/9 = 14/63
2/3 = 42/63
8/21 = 24/63
Since 42 > 24 > 14:
∴ 2/3 > 8/21 > 2/9
(ii) Compare 1/5, 3/7, 7/10
Convert to like fractions (denominator 70):
1/5 = 14/70
3/7 = 30/70
7/10 = 49/70
Since 49 > 30 > 14:
∴ 7/10 > 3/7 > 1/5