It is 23/4 in its simplest form
0.575 is a fraction. It is a fraction in decimal form rather than in the form of a ratio. However, that does not stop it being a fraction. Its rational equivalent is 575/1000 which can be simplified, if required.
5.75 isa fraction. It is a fraction in decimal form rather than in the form of a ratio. However, that does not stop it being a fraction. Its equivalent, in rational form, is 575/100. You can simplify this rational fraction if you so wish.
575 is an integer, not a fraction. There is not really a sensible way of writing it as a fraction or mixed number.
4.27 as an improper fraction is 427/100
Improper fraction is greater than a proper fraction.
4/9 is a proper fraction and there is not an improper version.4/9 is a proper fraction and there is not an improper version.4/9 is a proper fraction and there is not an improper version.4/9 is a proper fraction and there is not an improper version.
5.8 as an improper fraction is 58/10.
There is no equivalent improper fraction.
There is no equivalent improper fraction.
There is no equivalent improper fraction.
There is no equivalent improper fraction.
Improper Fraction.