Grrrr....cannot add fractions in a fill in the blank

Sorry to hear that you are running into trouble with Fill in the Blanks. The slash (/) is used for separating alternative answers as described when entering the text, so the solution button showing 2/3 means that either 2 or 3 is correct. I assume that fill in the blanks had been created with text in mind, not numbers.

In fact, there's a pull request pending that would offer a workaround using so called regular expressions, but that would really be a "detour". You'd have to write *[[[2\/3]]]*. Anyway, the pull request is still in review and not implemented, and even with it being accepted, there should probably be a more elegant solution that doesn't break old content.

Your suggestions are welcome! 

As otacke says the FITB activity is expecting plain text to be inserted in the blanks. Actually, things would be easier if the original programmer had decided to use the universally accepted character (in computing) for separating alternative elements "|", vertical bar aka pipe character!

As a provisional workaround, you might use that vertical bar for your fractions, of course making it clear to your users that that they have to use it (and HOW to produce that character on their keyboard).

Is it safe to assume that the separator could be safely changed from / to | using the H5P content upgrade hook (compare e.g. upgrades.js in Interactive Video)? Or do you expect that someone used | within a solution for a blank? Introducing \ as escape character in general would help here, of course, and might be a nice contribution anyway.

If we agree that replacing the forward slash / with a pipe character | to separate alternative solutions in the Blanks library, this would indeed need adding an upgrade rule in the upgrade.js. Since it seems that the use of the forward slash / separator causes a problem only in the case of fractions, I suggest a solution which does not rely on changing the separator. I have tried Otacke's suggestion of using the escape backslash character, but found it impossible to implement in my little search & replace routine. So I propose to use a double forward slash for fractions.

Here is an illustration of how it works for the question creator.

This fraction 8/12 can be simplified as *2//3/4//6* of course. The sum 4 can be obtained with *1+3/2+2/3+1/12//3*.

The first blank will accept "2/3" or "4/6" as correct answers. The second blank will accept "1+3" or  "2+2" or "3+1" or "12/3".

One further problem is when asking for "show solutions", the forward slash is used, which makes fractions undistinguisable!

I suggest replacing the "show solutions" forward slash with a pipe character surrounded with blanks " | " so we have now:

See suggested routine on JSFiddle at https://jsfiddle.net/fwy6gt2z/2/

If people agree with my proposal I will pull a request to the H5P github.

You made my day!

I was wondering if this feature would be added. I was hoping to use the Fill in the Blank to help assess html </html>. Thank you!

I would like to ask a blood pressure reading for nurses and doctors.

The Blood Pressure 120/80 does not wor and needs to be split into two entries ie: *120*/*80*

It would be great to allow 120/80 with an escape charactier of some sort...

Hi, I enjoy very much working with H5p, thanks to all developpers, this is a wonderfull Job !

I’m creating exercices to work on formula and improve nowledge in spreadsheets. It’s difficult for pupils to use * in spreadsheet and X in exercice ;  / in spreadsheets and ÷ in exercices.

So I agree, it will be usefull to add an escape character.

On line 724 of blanks.js, there seems to a single line of code that defines this behavior.

// Split up alternatives
var solutions = solution.split('/');

I am not suggesting that making this change would just involve this line, of course, but this seems to be crucial line where the behavior is defined. One might be able to change it locally.

As others have noted above, the choice of the forward slash was simply not a good choice.  A bar, i.e., the character '|' , would be much better because it is consistent with many programming languages that use '|' or '||' to denote some form of OR.   The bar character is seldom used in answers, whereas the forward slash is used all the time in answers (fractions, blood pressure, dates,...). 

It really should be fixed.  Little things like this might seem trivial, but they are not.   The lack of the ability to have any fractions in answers severely limits H5P blanks questions for use in most mathematics or science settings.  People will reject H5P for alternatives and move on.

In addition, I would also advocate for implementing an escape character on top of changing the forward slash to '|'.    That would require a little more coding.

Currently in the proccess of testing the software and ran into a problem with a fractional answer. It's baffling how easy it is to fix this and yet it has not been, in over six years! This is very big problem although it has not been treated like one, if anyone with access to the code were change a foward slash to a back slash or just about anything else this software would be 10x better. 
Please fix this. 

waiting for an early solution to this issue. would be of great help.