To divide 6/13 by 6/12

The trick to dividing fractions is simply to cross multiply.

When dividing:

..a........c

.--.../...--

..b........d

you get :

a*d

----

b*c

applying this to your example:

..6........6

.--.../...--

.13.......12

you get :

6*12

----- .......the 6's cancel and you are left with

13*6

12/13 answer