Mathcad understands percent, what about ppm?

[erikblue]

Hi, completely new to MathCad (using MathCad prime 6.0).  I'm doing some engineering work and simply need MathCad to understand "ppm".  I've tried to find a solution on this forum and via google to no avail.

For example, I can assign "25%" to a variable and when I output that variable I get 0.25.  But when I assign "25ppm" to a variable, it doesn't understand.  Any suggestions?

Thank you,

Erik

[terryhendicott · Accepted solution]

Hi,

Try this

[erikblue]

That'll do, thanks very much for the help.

[LucMeekes]

Additional note:

Make sure that you define ppm with the label of 'unit', rather than 'variable'.

By default, in Prime it will be(come) blue, bold and italic: ppm.

Luc

[Werner_E]

I can only second what Lucs suggested.

Its only when ppm is defined (labelled) as "Unit" that you can use it the other way round, too.

[erikblue]

Even better, thanks!

And for other noobs out there who run across this, you need to apply a label to the "ppm", so it becomes blue color.  Do this by going to Math->Style and then use the drop down to change from "variable" to "label".