how to solve problems in ratio

12:59

5:21

13:45

11:09

3:53

8:07

10:09

8:34

7:54

3:28

7:21

7:21

کوتاه

1:55

16:38

2:47

7:40

3:41

8:17

6:02

1:03

30:14

6:01

2:47

4:03

5:30

7:49

6:56

4:41

4:41

4:06

4:06

2:12

2:12

5:47

5:47

9:48

19:03

15:54

13:14