Fractions & Percentages Worksheet With Answer Key Page 12
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16Fractions & Percentages
Example:
A car cost £12,000. After 3 years it is worth £8,000. What is the
percentage decrease?
12,000
-
8,000
Solution:
Percentage decrease =
100
×
12,000
4000
=
100
×
12,000
= 33.33% (rounded to 2 decimal places)
Questions (calculating percentage increases/decreases)
1. Last year, an alumni association had 45,000 members. Women
younger than 40 totalled 4500; 12,800 were men younger than 40;
7,900 were women older than 40; and the remainder were men
older than 40. If the number of men over 40 increases by 3% in the
following year, how many men over 40 are part of the alumni.
2. A shipping company has seen an increase in gasoline from £2.30
per gallon to £3.40. What is the percentage increase?
3. Last week, 145 new customers were registered through your
company’s website. This week, 267 new customers were
registered. What is the percentage increase?
12
Dr. Mundeep Gill
Effective Learning Advice Service
elas@brunel.ac.uk
LC019
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