1/4 и 1/14

1/4 = 7/28 и 1/14 = 2/28

4/15 и 7/10

4/15 = 8/30 и 7/10 = 21/30

4/9 и 11/12

4/9 = 16/36 и 11/12 = 33/36

3/8 и 5/9

3/8 = 27/72 и 5/9 = 40/72