Найди творение 2/7*3/5 3/4*5/6 4/7*7/9 15/16*48/55

1-ый пример.

2/7 * 3/5 = 2 * 3/7 * 5 = 6/35;

Второй пример.

3/4 * 5/6 = 3 * 5/4 * 6 = 15/24 = 5 * 3/8 * 3 = 5/8;

Третий пример.

4/7 * 7/9 = 4 * 7/7 * 9 = 28/63 = 4 * 7/9 * 7 = 4/9;

4-ый пример.

15/16 * 48/55 = 15 * 48/16 * 55 = 720/880 = 9 * 80/11 * 80 = 9/11.