This document discusses cancelling fractions to simplify them into their lowest form. It explains that to cancel fractions, you divide the top and bottom numbers by the same number. For example, the fraction 4/8 can be cancelled down to 1/2 by dividing the top and bottom by 4. Fractions that can be cancelled down in this way are called equivalent fractions. The document provides examples of cancelling fractions in single steps or multiple steps.

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

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

3. 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

4. Cancelling fractions Example Cancel down this fraction

5. Cancelling fractions Example Cancel down this fraction First, find the largest number that will go into 4 and 8

6. Cancelling fractions Example Cancel down this fraction First, find the largest number that will go into 4 and 8 4

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

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

9. Cancelling fractions So,

10. Cancelling fractions So, No other number will divide in to the top or bottom so this is its lowest form .

11. 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 .

12. Cancelling fractions We can also cancel in steps

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

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

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

16. Summary These fractions are all equivalent fractions

17. Summary These fractions are all equivalent fractions The fractions can be cancelled down to

18. Summary These fractions are all equivalent fractions The fractions For example can be cancelled down to

19. Summary These fractions are all equivalent fractions The fractions For example can be cancelled down to

20. 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

21. Now try these Cancel down these fractions into their lowest form: 1 . 2 . 3 . 4. 5 . 6 .

22. Now try these . 1 . 2 . 3 . 4. 5 . 6 .

23. Now try these In a group of 500 people 40 have green eyes. What fraction of the total have green eyes?

24. Now try these In a group of 500 people 40 have green eyes. What fraction of the total have green eyes? Divide by 10 Divide by 2

25. Now try these 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?

26. Now try these 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

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