CAMBRIDGE LOWER SECONDARY MATHEMATICS 8: UNIT 10 PERCENTAGES
Name ___________________________________ Date _____________
Language worksheet 10.1–10.2
1 Bon has given the following answers for his homework. Are his answers correct, incorrect or
incomplete? Correct or explain the mistakes. The first question has been done for you.
a There are 2347 students in a secondary school. 1492 are girls.
Is there a higher percentage of girl or boy students? Justify your answer.
There is a higher percentage of girl students.
Incomplete. Bon has answered the question but he has not justified it.
b Explain the meaning of percentage increase.
It is when there is an increase from a lower percentage value to a higher one,
e.g. from 40% to 50%.
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c Give an example of a percentage decrease.
There were 10 boys in Justin’s high school class in the first year. This fell to 5 boys
in the second year. There was a 50% decrease from the first to the second year.
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d Circle the number which is the multiplier in the following calculation.
165% of $275 = 1.65 × $275 = $453.75
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e The original cost of a coat was $64. In a sale this is reduced by 25%.
What is the absolute change in the price?
25% decrease = 0.75 x $64 = $48
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Cambridge Lower Secondary Mathematics 8 – Byrd, Byrd & Pearce © Cambridge University Press 2021 1
