Is the answer 5/6

1/3 is the same as 2/6, and adding to 3/6(or 1/2)= 5/6.

Wait so I was right??

Yeah, you got it, good deal.

This may be a helpful site:
Fractions

Indeed your answer is correct.

Denominators must be made the same,

So both numbers on the bottom, need to be made the same.

Whatever you do to the bottom of a fraction. i.e multiply. You do to the top of the fraction