Fractions And Percentages Worksheet Page 4
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28MEP Pupil Text 11
Converting to a fraction
20
1
=
=
Note that
20%
100
5
1
=
×
Therefore
20% of £84
£
84
5
= £ .
16 80
.
Converting to a decimal
= 0 2 .
Note that
20%
=
×
Therefore
20% of £84
0 2
.
£
84
= £ .
16 80
.
Worked Example 2
A shopkeeper decides to increase some prices by 10%. By how much would she increase
the price of:
(a)
a loaf of bread costing 90p
(b)
a packet of cereal costing £2.00?
Solution
1
=
First note that 10%
.
10
1
=
×
(a)
10% of 90p
90
p
10
= 9 p
.
So the cost of a loaf will be increased by 9p.
1
=
×
(b)
10% of £2
2 £
10
= £ . 0 20
or 20p.
So the cost of a packet of cereal is increased by 20p.
Worked Example 3
A farmer decides to sell 25% of his 500 cows. How many cows does he sell?
Solution
1
=
First note that 25%
.
4
1
=
×
25% of 500
500
4
= 125
.
So he sells 125 cows.
237
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