Fractions to Decimals
http://www.sheppardsoftware.com/mathgames/fractions/FractionsToDecimals.htm -
Can you do Levels 1 - 5?
Also, the game below is converting fractions and decimals!
http://www.topmarks.co.uk/Flash.aspx?f=PercentageFractionChains
Working with Percentages
http://www.bgfl.org/bgfl/custom/resources_ftp/client_ftp/ks2/maths/percentages/index.htm (If you find it tricky, use a calculator!)
Dick and Dom will get you ready too; see this link:
http://www.bbc.co.uk/bitesize/ks2/maths/number/percentages/play/