This presentation will help you to cancel down fractions to
show them in their lowest form.
Left click on the mouse to reveal the next section
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