Printing to stack for free42/plus42

[nickapos]

Good afternoon/morning to everyone.

I have a question that I feel is trivial but I have not been able to find a clear answer/example for.
I want to calculate a quantity and then based in that print to the stack several values based on that quantity I.e 60% of the quantity 70% of the quantity and so on with a label for each line.
Is there a straightforward way to do that? In most programming languages we can do string interpolation and produce formatted strings.
Is there a way to do that with rpn?

Thank you very much