Students can make a connection between simple percentages, eg. 20% is double of 10%, 15% is half of 30%. Questions can be differentiated by choosing easier or harder numbers.
PowerPoint (Percentage trees editable)- you can go through the percentages step by step first just with the percentages, then with an example. Last 2 slides are for printing double sided, can be also cut up/
Excel - you can put your own number in the middle and on the answer page all the solutions will appear.
PDF - blank worksheet, 3 on each page, can be printed double sided.
PowerPoint (percentage trees - double sided) - 4 x A5 sheets (2 on each A4 page)