The difference between a number and 6 is12

Somone me i want to know what 18 hours out of 24 hours in a fraction

The dolphins at the webster are fed 1/2 of a bucket of fish each day the sea otters are fed 1/2 as much fish as the dolphins how many buckets of fish are the sea fed each day? simplify you answer and write it as a proper fraction or as a whole or mixed number

Ineed to know the answer to this algebra question.