convert from decimals to fractions

[pannus0]

Is there a function to convert from decimals to fractions?

[LucMeekes]

Try the symbolic keyword confrac.

Success!
Luc

[pannus0]

I tried it as you suggested and I get:

[LucMeekes]

That's correct, it means 0 + 1/2.

Did you read the manual? Add ",fraction" to confrac and see what happens.

Success!
Luc

[Werner_E]

Definitely fractions, but chances are that @pannus0  expected to see 13 + 9/20 🙂

[Werner_E · Accepted solution]

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@pannus0 wrote:

Is there a function to convert from decimals to fractions?

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Not ready-made. You would have to program your own.

In real Mathcad (legacy Mathcad, versions 15 and below) there was a formatting option which would display a number with fractions but Prime does not offer this facility.

[LucMeekes]

In real mathcad we had (have !):

and the functionality is available in Prime as well, according to the manual.

Luc

[pannus0]

Something curious only happens with 0.25,0.25, but when they are numbers for example 0.375 this doesn't happen, any solution?

[Werner_E]

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@LucMeekes wrote:

In real mathcad we had (have !):

and the functionality is available in Prime as well, according to the manual.

Luc

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Really? Can you post a link to the corresponding help page in Mathcad Prime Help

I could not find "convert" in Prime and also not in legacy Mathcad 15.

Neither as a function nor as a symbolic keyword.

And "confrac" with modifier "fraction" works the same in Prime as in MC15

[Werner_E]

Here is a quick hack. The display is all but nice, though.

It should(may) work up to 12 decimals. Using a higher value for N increases the chance for round off errors when using "gcd".

We could determine the power of 10 needed to multiply the number to get an integer using strings. We might convert the absolute value of the fractional part into a string, delete the leading zero and the decimal point (if present) and the length of the string would correspond to the exponent of the power of 10 needed. Nonetheless the main problem still is the ugly display of the result.

In case you are not looking for mixed fractions you may also use the similar "test2".

While the display format as an 1x3 or 1x2 matrix sure isn't clear an nice, we have at least numerical results which could be used for further calculations (whatever they may be).

Of course we could convert the result into a string which makes for a slightly nicer look but could be used for display only.

Best result in Prime I could achieve was with the symbolical evaluation of a simple program

But sure nothing compares with the simplicity of real Mathcad's formatting options:

Prime 11 sheet attached