Ответ:

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Пошаговое объяснение:

1. 1/6=2/12 3/4=9/12

2.9/20=27/60 13/30=26/60

3.7/9=28/36 5/12=15/36

4. 1/12 1/3=4/12

5. 7/9=35/45 4/15=12/45

6. 5/16=15/48 7/24=14/48

7. 17/48=51/144 19/36=76/144

8. 21/34=63/102 22/51=44/102