Junior Secondary · Mathematics

Use of Percentage: Practice Questions

5 multiple-choice questions marked as you go, and 3 written questions with worked solutions. All on Use of Percentage.

8 questions18 marksFree, no account

Question 1

1 mark

A company had $ 120 $ employees last year. This year, the number of employees decreased by $ 15\% $. How many employees does the company have now?

Question 2

1 mark

A company's annual revenue was $ \$800,000 $ in 2021. In 2022, the revenue increased by $ 15\% $. However, in 2023, the revenue decreased by $ 10\% $ compared to 2022. What was the company's revenue in 2023?

Question 3

1 mark

Mr. Chan deposits a sum of money into a bank at an interest rate of $4\%$ per annum, compounded half-yearly. If the total interest earned after one year is $\$808$, find the principal amount deposited.

Question 4

1 mark

If the value of a machine depreciates by $ 12\% $ each year, what is the value of a machine originally worth $ \$50,000 $ after one year?

Question 5

1 mark

Mr. Chan deposits $ \$20,000 $ into a bank account that pays a simple interest rate of $ 4\% $ per annum. How much interest will he earn after 3 years?

Question 6

5 marks

A store owner marks up an item by $ 60\% $ above the cost price. During a clearance sale, he offers a discount of $ 40\% $ on the marked price. Determine the overall percentage profit or loss based on the cost price.

Write your answer out first, then check it against the worked solution.

Question 7

5 marks

The population of a city grew by $ 2\% $ in 2022 and then by $ 5\% $ in 2023. If the population was 420,000 at the end of 2023, find the population at the beginning of 2022, correct to the nearest hundred.

Write your answer out first, then check it against the worked solution.

Question 8

3 marks

A technician's monthly salary was increased by $ 15\% $ to $ \$27,600 $. Find his original salary before the increase.

Write your answer out first, then check it against the worked solution.

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