7/12 = 21/36,
8/9 = 32/36, ⇒ 7/12 < 8/9,
2/9 = 20/90,
1/10 = 9/90, ⇒ 2/9 > 1/10,
5/24 = 10/48,
3/16 = 9/48, ⇒ 5/24 > 3/16,
1/20 = 3/60,
2/15 = 8/60, ⇒ 1/20 < 2/15
2. 2/9 > 1/10
7/12 = 21/36,
8/9 = 32/36, ⇒ 7/12 < 8/9,
2/9 = 20/90,
1/10 = 9/90, ⇒ 2/9 > 1/10,
5/24 = 10/48,
3/16 = 9/48, ⇒ 5/24 > 3/16,
1/20 = 3/60,
2/15 = 8/60, ⇒ 1/20 < 2/15