Exercises involving fractions of numbers (e.g. 2/5 of 240) that can first be discussed as a class leading into paired work. The powerpoint discusses the formulas used for working out fractions of numbers and also touches on the point that, when dealing with fractions, X and OF mean the same thing.
To finish with, plenary-wise, there is a task that children can complete (either in pairs or individually) geared to their level confidence at this particular point. Together with good quality questioning, this should prove to be useful resource across Key Stage 2 (particularly in Years 5/6).