Question 175341
I assume that the fractions are mixed numbers as stated.

6-3/4 ÷ 3 =

I would change 6_3/4 to an improper fraction as step one.

So, 6_3/4 = 27/4

We now have:

27/4 divided by 3

You can write any number over 1 because any number divided by 1 = itself.

In other words, 3 can be written as 3/1.

27/4 divided by 3/1

We reverse 3/1 to 1/3 and change the problem from division to multiplication.

We do this because multiplication and division are inverses of each other.

We now have 27/4 X 1/3 = 9/4 

Do the same with the other question.

Understand?