Hi Zeta Maths,
To go over our strategy to use multiplication to find fractions of a set or find the number in a set, check out these two videos. You might like to get a piece of paper or whiteboard to work the problems out as you watch.
Birthday Cakes 1
Birthday Cakes 2
When you are done, grab the sheet from your folder and use the strategy to work out the practise questions. Any issues or confusion, be sure to tell me on Friday.