Macworld Forums: excell specific % question (kind of dumb, really) - Macworld Forums

Hi, I have a simple question for the excell expert out there. It´s simple but It´ll be very usefull for me at my work.

We have a markup of 30% in our sales price, so if we pay 60 for a product we´ll sell it for U$ 60 + 30% = U$78,00.

But sometimes we must do the other way around, and simply taking 30% out of U$78 won´t be right. U$78-30% = U$54,60

So is there a simple way of doing it? Has excell (or numbers) an easy way of doing it? If not, How can I do it in a simple calculator?

TY

Cheers