**Unitary proportion** may sound like a challenging concept, but it is actually quite simple when we break it down.

The word UNI means one (think of a **uni**cycle with **one** wheel) and proportion refers to the relationship between objects.

So unitary proportion is all about finding the value of 1 item and then using this information to solve related problems.

Let's work through an example to see this in action.

**e.g. 5 pens cost 55 p. What is the cost of 8 pens?**

5 pens = 55 pence

1 pen = 11 pence (55 ÷ 5)

8 pens = 88 pence (11 × 8)

It's really as simple as that!

In this activity, we will practise using the information provided in the question to find the value of one item, then applying this knowledge to solve a related problem.