1. FRACTIONS

• This presentation will help you to cancel down fractions to show them in their lowest form.

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2. Cancelling fractions

• To simplify fractions we cancel down to make them easier to work with.

To cancel we have to divide the top and bottom numbers of a fraction by the same number

3. Cancelling fractions

• Example

Cancel this fraction First, find the largest number that will go into 4 and 8 4

4. Cancelling fractions Next, we divide the top and the bottom by 4

5. Cancelling fractions So, No other number will divide in to the top or bottom so this is its lowest form . We say that the fractions are equivalent .

6. Cancelling fractions We can also cancel in steps Example Divide by 5 Divide by 5

7. Summary These fractions are all equivalent fractions The fractions For example We cannot cancel down any further - so we can stop (it is known as the lowest form ). can be cancelled down to

8. Now try these Click on the mouse to reveal the answers. 1 . 2 . 3 . 4. 5 . 6 .

9. Now try these Click on the mouse to reveal the answers. In a group of 500 people 40 have green eyes. What fraction of the total has green eyes? Divide by 10 Divide by 2

10. Now try these Click on the mouse to reveal the answers. A total of 60 cars were repaired by a garage in a month. 15 of them were Vauxhalls. What fraction of the total number repaired were Vauxhalls? Divide by 5 Divide by 3

11. For further info

• Go to:

• BBC Bitesize Maths Revision site

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