[RMDupree]

That's a good way too!

But when I try to explain it that way, it's "too much math" to my nieces. *sigh*

I just tell them to move the decimal point one space to the left and multiply by two. Everyone can do that. (I hope.)

[TontoKowalski]

Here's another question...

If you're a straight 15%-er (or any-percenter, I guess), is that based on the food cost or the total bill (inlcuding tax)?

[AnAmericanMother]

I would rather divide than move decimal points around (always had trouble with the ol' slide rule doing that . . . . :-D )