No they are not, 6/8 could also be represented as 3/4. Therefore they are not equivalent. You would divide each side by the factor they have in common such as 2.
The answer is 3/5
Just keep the distributive property in mind.
Answer:

Step-by-step explanation:
OK, so basically I'm pretty sure that you add all of them together and put it as a fraction over 3 so basically
then simplify it into 
Answer:
3/4
Step-by-step explanation: