Is 5/6 less than 2/12

No, 5/6 is greater.

1) First, you have to get a common denominator, lets use 12

2) To get from 6 to 12 you would multiply times 2

3) Do the same to the numerator (the top number) which is to multiply 5 x 2

4) 5 x 2 = 10

5) So, now your fraction has become 10/12

And let me ask you, which is bigger, 10/12 or 2/12

(10/12 is bigger and 2/12 is less)