Percent sign question

[Former user]

The percent (%) calculation is going wrong.

450-30 percent=449.7

google result is:

450 - 30% = 315

[Helder Correia]

The % operator has been largely discussed in the past (e.g. see issue #239) and removed since version 0.12 (see issue #583). You must be using version 0.10 or 0.11.

[Helder Correia]

Sorry, I just realized you were talking about the percent built-in unit. In that case, it is merely an alias for the value 0.01, so you are multiplying 30 by 0.01 in the end, and that's not what you want.

[Helder Correia]

You can make use of the user functions feature like this:

perc(v; p) = v×(1−p×percent)

perc(450; 30)
= 315