Question 1
1 markA pair of shoes is sold for \( \$450 \) at a profit of \( 25\% \). Find the cost price of the shoes.
Key Stage 3 (KS3) · Mathematics
Percentage Change and Simple Interest: Practice Questions
2 multiple-choice questions marked as you go, and 4 written questions with worked solutions. All on Percentage Change and Simple Interest.
6 questions15 marksFree, no account
Question 2
1 markThe number of members in a sports club increased from 80 to 116. Find the percentage increase.
Question 3
2 marksThe population of a small town decreased from \( 2500 \) to \( 2300 \). Find the percentage decrease in the population.
Write your answer out first, then check it against the worked solution.
Question 4
4 marksA salary of \( \$20,000 \) is increased by \( 10\% \) in the first year and then decreased by \( 10\% \) in the second year. What is the final salary?
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Question 5
3 marksA shop sells a toy for \( \$120 \) after a \( 20\% \) discount. What was the original price of the toy?
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Question 6
4 marksA worker's monthly salary was increased by \(10\%\) to \$19,800.
(a) Find the worker's original salary.
(b) If the original salary is now decreased by \(10\%\) instead of increased, what would the new salary be?
Write your answer out first, then check it against the worked solution.
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