Fractions to Decimals to Percents

Here's a 'game' for practice changing between fractions, decimals and percents. Make sure you have paper and pencil.
http://www.mathgoodies.com/fractions/

Hey, I just found another good site for this! There are some 'factsheets' that explain how to convert, there is a quiz, and you could do up to I think 8 worksheets (hint: save your ink and answer them on paper - then check your answers using the link to the answer key)
The game is kinda', somewhat like concentration:
http://www.bbc.co.uk/skillswise/numbers/fractiondecimalpercentage/comparing/comparingall3/index.shtml