24/108 can be simplified so,
what is 24 divided by 2? 12
and what is 108 divided by 2? 54
so it would be 12/54
but can you simplify more? YES.
divide by 2 again and you get,
6/27 can you even more? yes again.
but divided by 3 instead, and you get,
2/9 so can you go even more? sadly no.
so there you have it 2/9.
hope I helped.... :)