Respuesta :

Answer:

B

Step-by-step explanation:

That is the answer

Answer:

The answer is B 17:21

Step-by-step explanation:

68:84

68/2=34

84/2=42

34:42 but we can also divide again so 34:42 can't be the simplest form of 68:84

so 34/2=17

42/2=21

17:21