Okay, to make a green dinosaur we use a ratio of 3:7. That’s three yellow dinosaurs for every seven blue. Smashing. To help think about this as a fraction, we need to take a look at them all together.

Dividing into a given ratio. You can use bar models to divide amounts in a given ratio. For example, Isabel and Geraint share their savings of £96 in the ratio 5 to 3. How much money does each person ...