You can divide 79677895891146625 by 6 and you get 13279649315191104 with a remainder of 1!
The fraction 79677895891146625 / 14949283383840498 is not reducible, and slightly different from 13279649315191104 / 2491547230640083
So your solution is wrong.
I see now why it is wrong. Your code (like the code of user pr0ace1) seems to use the floating point number division operator / instead of // for integer division since python version 3.
In python versions 2.x / could mean integer division, but this has been changed incompatibly since version 3.
You must calculate with integers, not floats.

There is bug in python when it doesn't get the lowest common multiple i got
[13279649315191104, 2491547230640083]
where the kata expect to
[79677895891146625, 14949283383840498].
you can divide the second in 6 and get the first...
all the tests are passing except of this test