Read through the powerpoint which explains how to work out these sorts of questions. They key to success is working out what 10% and 1% are! I will also upload a video going through a couple of examples. Make sure to ask for help if you need it!
Remember you must show your working out, no matter what method you used! If you did them in your head, write down the steps that you took.
Edinburgh - 1 and 2 star (You could try the 3 star questions if you're confident)
Cardiff and London - All questions.