# How to prevent reduction of a fraction into lowest terms?

I have a question about the concept of simplification. I want to explain it with an example. When I write the fraction $$4/8$$ in Mathematica, the output is

1/2.

How can I return this expression as $$4/8$$? How can I prevent simplifying rational numbers in lowest terms?

• Can't u use "4/8"? ;)
– Elf
Commented Dec 30, 2014 at 19:13
• HoldForm[4/8], and many Examples, if you use the search function on this page.
– user9660
Commented Dec 30, 2014 at 19:14
• ... or Defer[4/8].
– kglr
Commented Dec 30, 2014 at 19:14
• ... or check out Inactivate Commented Dec 30, 2014 at 19:18
• Thank you for your comments. Since i am a new user of mathematica, i dont know the functions very well. the functions Defer and HoldForm is ok for me. Best regards... Commented Dec 30, 2014 at 19:19

## 1 Answer

You can use the internal function InternalRationalNoReduce

InternalRationalNoReduce[4, 8]


InternalRationalNoReduce[4, 8]^2 + 5
`

• Never seen that before. +1 Commented Jan 11, 2015 at 9:49