I'm trying to put some marks in a spreadsheet and have a lot of unsimplified fractions or fractions like 19.5/20. Is there a way to enter fractions and have the cells be usable in other formulas, while keeping them displayed as originally entered?

3 Answers 3


Put the numerator and denominator in different cells. Use an extra column to calculate the decimal representation of the fraction (eg d2 = b2/cd) to use in calculations, and convert the original cells to text for display use.


Use the format option :

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or Format -> Number -> More Formats -> Custom number format...

Solution 1 :
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Use 0.0"/20" as a custom format on the cell containing 19.5.
WARNING : It has still the value 19.5 but is display as 19.5/20.

Solution 2
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Use the ??/20 custom format on a cell with =19.5/20

Long story short : it has the value 19.5/20 = 0.975 but will always display a round numerator with /20 denominator. I.E. 20/20 here. Having decimals within a fraction is way more complicated and is another question.


To my experience most methods fail.

The one I find most useful is:

  1. Write the fraction as a formula: =19/20

  2. Under Format -> More Formats->Custom number format use:

    _# ??/??

  • I tried this, although it simplified things like 19.5/20 to 39/40 and 90/100 to 9/10 :(
    – Akababa
    Sep 6, 2019 at 0:03

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