The prices of three items among five fuel items increased by 50 %. 90 % and
110% in the year 2015 as compared to the base year 2014. The prices of other
two items decreased by 5 % and 2% respectively. 1f the ratio of importance of these
five items is 5:4:3:2:1 find the index number of fuel prizes in year 2015
Answers
Answer:
Example 1
Katie earns £40 per week for her part-time job. She is to be given a 5% pay rise.
How much will she earn per week after the pay rise?
Example 2
The prices of all the televisions in a shop are to be increased by 8%.
Calculate the new price of a television that originally cost £150.
Example 3
In a sale the cost of a computer is reduced by 30%. The normal price of the computer was £900.
Calculate the sale price of the computer.
Exercises
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Question 1
(a) Increase £100 by 20%.
(b) Increase £400 by 30%.
(c) Increase £80 by 25%.
(d) Increase £50 by 6%.
(e) Increase 40 kg by 3%.
(f) Increase 250 m by 7%.
Question 2
(a) Decrease £60 by 30%.
(b) Decrease 8 m by 5%.
(c) Decrease 80 kg by 10%.
(d) Decrease £44 by 20%.
(e) Decrease 90 m by 2%.
(f) Decrease 420 kg by 25%.
Question 3
A company increases the cost of all its products by 5%. Calculate the new price of each of the items listed below:
(a) a tent that previously cost £60
(b) a rucksack that previously cost £15
(c) a sleeping bag that previously cost £24
Question 4
Joe was paid £30 per week for delivering papers. He was given a 3% pay rise.
How much will he now earn each week?
Question 5
A small firm employs 4 staff. They are all given a 4% pay rise. Calculate the new salary for each member of staff.
The original salaries are as follows:
John Smith £24 000
Alice Holland £22 500
Graham Hall £14 000
Emma Graham £8500
Question 6
Rachel puts £50 into a bank account. After one year 5% interest is added to her money. How much does she have then?
Question 7
Add
17 1
2
% VAT to each of the following prices:
(a) £200
(b) £70
(c) £42
Question 8
A rope is 8 m long but it shrinks when it gets wet. What would be the new length of the rope if its length is reduced by:
(a) 2%
m
(b) 7%
m
(c) 12%
m
Question 9
In a sale the prices of each of the items listed below is to be reduced by 35%.
Calculate the sale price of each item.
Coat £28
Jeans £42
Trainers £36
Shirt £14
Question 10
A mountain bike was priced at £180. Its price was increased by 8%. Later, this increased price was reduced by 20% in a sale.
Calculate the sale price of the bike.