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A **fraction** is part of a whole. It's **less** than** 1 **whole thing, but more than **0**. We use fractions all the time in real life. Have you ever ordered a **quarter**-pound burger? Or noticed that your gas tank is **half** full? Both of these are fractions of the whole amount—a whole pound of meat, or a whole tank of gas.

Fractions look a little like division expressions, but they aren't problems to be solved. They are a way of expressing an **amount**. Like numbers, fractions tell you **how much** you have of something.

Click through the slideshow to learn how fractions work.

Every fraction has two parts: a top number and a bottom number. In math terms, these are called the **numerator** and the **denominator**. Don't worry too much about remembering those names. As long as you remember what each number means, you can understand any fraction.

As you saw in the slideshow, the **bottom number**, or denominator, is the** number of parts** a whole is divided into. In our pizza example, we said each slice was **1/8** of the pizza. The denominator was **8**, since the pizza was divided into** 8** slices.

The top number, or numerator, refers to a certain number of those parts. It lets us know how much we're talking about. Since we're talking about **one** slice of pizza, our numerator is **1.**

Let's look at another example. What if we divided the same pizza into **12** slices instead of **8**? If we took one slice, that would be 1/12 of the pizza—**1** slice out of the **12** total slices. No matter what fraction you're trying to write, you always write it the same way—with the number of parts on the bottom, and the parts you're referring to on top.

Write these images as fractions.

In the example above, if you had a pizza with **eight** slices, each slice would be 1/8 of the pizza. You'd read that like this: **one-eighth**.

When we read or talk about fractions, we use special numbers called **ordinal** numbers. A good way to remember this is that many of them are the same numbers you use when you're putting things **in order**: third, fourth, fifth, and so on.

You might know some of these numbers already. For example, when you tell your boss you'll be at work in **half** an hour, you're saying that you'll get there in 1/2 of an hour. If you're helping a friend bake a cake and she asks you for a **third** of a cup of sugar, you might know to hand her the measuring cup that says 1/3.

Here are some of the most commonly used fractions:

A good rule to remember is that most ordinal numbers end in "**th**." So, 1/20 is **one-twentieth.** 1/35 is **one-thirty-fifth**. 1/54 is **one-fifty-fourth**.

What about fractions that don't have a 1 on top? Read these as if you were counting. So if 1/5 is **one**-fifth, then 2/5 is **two-**fifths, and 3/5 is **three**-fifths. The top number will always be a "normal" number like the ones you use to count, and the bottom number is always an ordinal number.

Write fractions to match the text.

Sometimes you might see a fraction next to a whole number. We call this a **mixed number**. We'll talk more about mixed numbers in the next lesson. For now, we'll concentrate on learning how to read them. Let's take a look at this example:

**2 1/2 **is a mixed number. If we say we have 2 1/2 pizzas, it means we have **2** whole pizzas and 1/2 of another pizza. You can read 2 1/2 like this: **two-and-a-half**.

Let's try another example. What if you pour 1 whole cup of tea, then fill only 2/3 of another cup? You could write that situation like this:

You'd read 1 2/3 like this: **one and two-thirds. **Remember, the whole number is always **first**.

Write the correct mixed number next to each picture.

So far, you've learned that a fraction is a **part** of a whole. For example, 3/4 means you have **three** **parts** out of **four** **parts total**. But what if you had a fraction like this?

8/8

In this example, we have **eight parts** out of **eight parts** **total**. If the top number and the bottom number of a fraction are the same, then the fraction is equal to 1. That's because you have **every part** of the fraction, or **one whole thing**. This is sometimes known as a **whole** **fraction**.

So if you had **eight** slices of pizza out of **eight** **total**, you'd have **one** whole pizza.

Let's look at another example: 8/8 and 2/2. While these fractions may look different, they're actually just two ways of saying the same thing. Because these are whole fractions, 8/8 and 2/2 are both equal to 1. And because they're both equal to 1, they're also equal to each other.

Write the correct whole fraction under each picture.

Want even more practice? Try out a short assessment to test your skills by clicking the link below: