Szczegółowe wyjaśnienie:
2/3
5/6 × 3/10 = 1/2 × 1/2 = 1/4
8/21 × 7/16 = 1/3 × 1/2 = 1/6
4/25 × 15/16 = 1/5 × 3/4 = 3/20
5/16 × 12/35 = 1/4 × 3/7 = 3/28
6/25 × 10/21 = 2/5 × 2/7 = 4/35
7/20 × 24/49 = 1/5 × 6/7 = 6/35
10/21 × 14/15 = 2/3 × 2/3 = 4/9
