Respuesta :

Answers= 10/14 and 15/21

Answer: 10/14, 15/21, 20/28

Step-by-step explanation:

5 times 2 is 10

7 times 2 is 14

5 times 3 is 15

7 times 3 is 21

5 times 4 is 20

7 times 4 is 28