**What Is ****a Ratio****?**

A ratio is simply a way of comparing two or more quantities.

**What Does a Ratio Look Like?**

A ratio is just two numbers written with a colon between them,

**e.g. 3:5 2:7 etc.**

**Does the Order Matter?**

Yes, absolutely it does!

3:1 is **not** the same as 1:3, so always take care with the order.

Let's look at ratio in action in an example now.

**e.g. I have 4 red balls and 6 blue balls. Write a ratio for the ****amount**** of red balls to blue balls.**

Look carefully at the question here - we are asked to find 'red balls to blue balls'.

So the ratio we need to use will be expressed as:

**Red:Blue**

Now we just need to substitute the correct numbers into this ratio:

**4:6**

While this ratio can be cancelled down, don't worry about that at this point, we will focus on learning how to do this in the Level 2 activity on ratio.

In this activity, we will create ratios to compare two quantities which have something in common. We will express these ratios in the form a:b, but we will not be simplifying them at this point.