We might introduce the concept of 'tiling patterns' to support children's understanding of ratio and proportion, for example:
This is the tile pattern on my kitchen floor.
What proportion of the tiles are blue?
For every yellow tiles how many blue tiles are there?
This is essentially the same as the zebra crossing problem.
This is my friend's kitchen floor.
What proportion of the tiles are green?
For every purple tile how many green tiles are there?