posted by norma .
a rectangle is 1/2 red and 1/3 blue. Also it has one green tile and one yellow tile. What would the rectangle look like? What fractional part is green? Yellow?
since it has 2 tiles not red or blue, and that is 1/6, the rectangle has 12 tiles.
So, there are 6 red tiles and 4 blue tiles. Arrange them as you will.