Both 165 and 847 can be evenly divided by 11, so in lowest terms, 165/847 = (165/11)(847/11) = 15/75.
322 over 330 in lowest terms is 161/165
660 over 165 = 4/1 = 4
8/11 - 4/15 = 120/165 - 44/165 = 76/165 which cannot be simplified.
8/11
Fractions have lowest terms, but integers (whole numbers) don't.
Since the numbers 76 and 165 share no common positive integer factor, the proper fraction 76/165 is already expressed in its simplest form.
33/20
If you are looking for the LCM it is 165.
You can't simplify that any more.
4/15
The LCD of 5/25 and 5/33 is 825. Of course, 5/25 is 1/5 so you may be able to simplify to 165
Well, honey, the answer to 165 over 1000 in its simplest form is 33 over 200. You just divide both numbers by 5 to simplify it. Math doesn't have to be a headache, darling.