Like I know that 15% and 10% comes to .234, but call me lazy- why can't I just see a chart and memorize or see a chart for easy reference? Has anyone heard of this?:confused:

Actually, charts like this do exist because I've seen them in business math books. Although one chart I know of wouldn't give the .234. It would give the cost equivalent, i.e. the .85 x .90. You have to subtract from 1.0 if you want the net discount amount.

Personally, it's faster for me to just figure it out than dig out some chart and look at it. I don't have access to a text with it, but I can see if I can find one online. Don't know how much luck I'll have. If I find one, I'll post it later.

So the answer to the question is yes, I've heard of it. :-) But trust me, you wouldn't want to memorize it!

Thanks! I wouldn't mind having a chart like that! :p

This could be a completely ridiculous suggestion as I have no idea about his area but couldn't you make your own chart in excel? If is worked out from a formula then it wouldn't even require much work.

Anyway if that's mad, just ignore me ;)

The trouble with that is, it could take a lot of figuring. Because of the multiples of combinations of them.

Like 15% and 10%, 10% and 2%, 2% 3.9% and 12%

The list would reach the moon.

I agree with peeled_turtle that it would be time-consuming working it all out. But if this is for a class, they usually won't start getting into stuff like 3.9%. The charts I've seen have maybe 10 columns and rows, listing amounts like 10%, 15%, 20%, etc. They'll even combine 10/15 in a column and then have say 20 down the left so that you can find that combination.

I think it's actually a pain even using those charts, since it's easy to do on a calculator quickly if you're practiced at it. And I think it would be even more of a pain to make a chart in Excel. Since they all work exactly alike, you only have to know how to do one thing, and then do that thing every time. If this was for someone's job and they had common combinations they used, it might be worth the time to make a chart that could be used for years.

Back to the original poster, I was not able to find anything and really didn't think my chances were very good. I did find a place where they had some example chapters from some textbooks, but there was very little and didn't contain anything like that. If this is for class and you're not allowed to use such a chart on a test, it won't really help you in the long-run anyway.