Fractions And Percentages Worksheet Page 5
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28MEP Pupil Text 11
11.2
Worked Example 4
Natasha invests £200 in a building society account. At the end of the year she receives 5%
interest. How much interest does she receive?
Solution
5
1
=
=
First convert 5% to a fraction.
5%
100
20
1
=
×
5% of £200
£
200
20
= £10
.
So she receives £10 interest.
Exercises
1.
Find
(a)
10% of 200
(b)
50% of £5
(c)
20% of £8
(d)
25% of £100
(e)
40% of £500
(f)
90% of 200
1
(g)
33
% of £12
(h)
75% of 800
(i)
75% of 1000
3
(j)
80% of 20 kg
(k)
70% of 5 kg
(l)
30% of 50 kg
(m)
5% of 100 m
(n)
20% of 50 m
(o)
25% of £30
2.
Find
2
3
1
(a)
of 80
(b)
of 120
(c)
of 90
5
4
5
1
4
3
(d)
of 360
(e)
of 150
(f)
of 500
4
5
10
3.
A firm decides to give 20% extra free in their packets of soap powder. How much
extra soap powder would be given away free with packets which normally contain
(a)
2 kg of powder
(b)
1.2 kg of powder?
4.
A house costs £30 000. A buyer is given a 10% discount. How much money does
the buyer save?
5.
John has invested £500 in a building society. He gets 5% interest each year.
How much interest does he get in a year?
6.
Karen bought an antique vase for £120. Two years later its value had increased
by 25%. What was the new value of the vase?
7.
Ahmed wants to buy a new carpet for his house. The cost of the carpet is £240.
One day the carpet shop has a special offer of a 25% discount. How much money
does he save by using this offer?
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