kak minta tolong ya dikerjakan ini. pakek cara yaaa

1.7/5: 5/4 = 7/5 × 4/1
= 28/5
= 5 4/5

7/5 : 1/4 = 7/5 x 4/1 = 28/5 = 5 3/5
5/11 : 3/6 = 5/11 x 6/3 = 30/33
12/5 : 5/4 = 12/5 x 4/5 = 28/20 = 1 8/20
9/12 : 3/5 =9/12 x 3/5 = 9/20
8/15 : 6/10 = 8/15 x 10/6 = 8/9