I think my school required that all answers are in fractions. I get 3736/455, but I thought it was way too ugly to be the correct answer.
That will depend on your school...
When you start adding parallel resistances, the 'exact' number can get quite messy unless the question is very carefully calculated to provide a 'simple' answer.
It's also great that you calculate it down to a fraction that provides a value with a few decimal places of accuracy, but in the real world, that kind of accuracy will rarely (If not ever) exist.
For now, hang onto your fractions, but you should probably confirm if the answer should be a fraction or not... as almost all of the answers I calculated in physics or Electronics required an answer with no more than 5 significant digits.. I can't imagine such a complex fraction would be the desired answer if the same thing can be expressed accurately enough with a simple ( 6.43Ω ) **Note this value is made up.
I ran the numbers from your first picture, and so far, am confident in your skills. Do as Davenn suggested to double check your work and we can all move forward from there.
Proverb of the Day for
@DoubleDogDan
"
give a man a fish and you feed him for a day; teach a man to fish and you feed him for a lifetime"
This is homework help. Merely providing the answer without showing work, or encouraging the op to come to their own conclusion will not help them in their pursuit and may hinder the learning process. Of course, this would be different if they provide an answer already and simply want verification if it's done right.