Ответ:

1.

1) 4/5 ÷ 3/7= 4/5 ×7/3 = 28/15

2) 16/25 ÷ 2/5 = 16/25 × 5/2 = 80/50 = 8/5 = 1 3/5

3) 5/7 ÷ 1/7 = 5/7 × 7/1 = 35/7 = 5

2.

1) 2 4/9 ÷ 1 2/9 = 22/9 × 9/11 = 2

2) 1 3/4 ÷ 2 5/8 = 7/4 × 8/21 = 2/3

3) 2 3/4 ÷ 3 3/4 = 11/4 × 4/15 =11/15

Пошаговое объяснение: