Re: bag of marbles question 5th grade HELP!

Mon, 7 Apr 2008 22:30:41 -0400 from Marvel <goh@[EMAIL PROTECTED]
>:
> What would the formula be?
> 
> In a bag of  red and black marbles there are 18 fewer red marbles than
black
> 
> If 45% of the marbles are red how many marbles are in the bag. 

If 45% are red then 55% are black. The difference is 10%. You already 
know the difference is 18.

18 is 10% of what number?

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