If you are uncomfortable with basic calculations with fractions and decimals, solving equations in one variable etc, check out this website:

http://www.purplemath.comBesides, we have a book called 'Math Essentials' that takes you through the essentials you need for GMAT. You can check out its table of contents using the link below:

http://www.amazon.com/Math-Essentials-Veritas-Prep-GMAT/dp/1936240009/ref=sr_1_1?ie=UTF8&s=books&qid=1290008486&sr=8-1#reader_1936240009 _________________

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