Conditional formatting of cells excel 2007 marks per question

see spreadsheet. columns a-f contain pupils details.g4-r23 contain marks for 12 questions. row 24 contains total marks for that question. questions are out of 2,3,4 and 5 marks. I would like to format the cells to reflect % for that question. At the moment I have to format column by column to do that. When I format the whole spreadsheet 0 and 1 show in red 2 and 3 in yellow and 4 and 5 in red. I want 2 when equalling 100% to show green not yellow . I hope that makes sense.