Fractions Worksheet Page 24
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36Fractions
To change a decimal to a percentage, multiply by 100.
To change a fraction into a percentage you multiply by 100.
You can go directly from a fraction
to a % like this:
To do this you divide the numerator of the fraction by the
2
200
3 100 5
5 40%
denominator.
5
5
20
EXAMPLE
When using a calculator, you can
either use the fraction button as
in part (a) or the division button
Write these fractions as percentages.
as in (b).
9
31
(a)
(b)
10
40
9
9
(a)
5 (
3 100)% 5 90%
10
10
31
(b)
5 (31 4 40 3 100)% 5 77.5%
40
To change a fraction to a percentage multiply by 100.
Now that you can change between percentages, fractions
or decimals, you can make comparisons between all three.
21
EXAMPLE
Write these in order of size, smallest first.
7
2
0.39 45%
20
A calculator has been used to
5
change the quantities into decimals.
2
5 0.4
5
45
45% 5
5 0.45
100
7
5 0.35
20
Since
0.35 , 0.39 , 0.4 , 0.45
7
2
The order is
, 0.39 ,
, 45%
20
5
Number 83
M03_CMC_SB_IGCSE_6850_U03.indd 83
9/6/09 16:45:19
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