How to subtract fractions with different denominators for dummies?

In trapezoid klmn, kj=19.2 and jm=22.5. identify ln.

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

Suppose the equation ||x-a|-b|=2008 has 3 distinct real roots and a not =0. find the value of b.