Question

Помогите пожалуйста номер 520

Answer 1

3/10 = 10/3
4/5 = 5/4
13/15 = 15/13
6/25 = 25/6
21/28 = 28/21
5/3 = 3/5
35/44 = 44/35
200/11 = 11/200
25= 25/1 = 1/25
71= 71/1 = 1/71
321= 321/1 = 1/321