Understanding Percentages Effectively

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📊 Part 1: Basic Percentage Calculations

Instructions: Calculate the following percentages. Show your working in the space provided.

1. Find 50% of 90

2. Find 25% of 80

3. Find 10% of 150

4. Find 20% of 60

5. Multiple Choice: What is 5% of 200?

Instructions: Read each problem carefully and solve. Use bar models or drawings if they help you.

6. A jacket costs $80. It is on sale for 25% off. How much money will you save?

Answer: I will save $__________

7. There are 120 students in Year 5. 40% of them play rugby. How many students play rugby?

Answer: __________ students play rugby

8. A recipe calls for 300g of flour. You want to make 50% of the recipe. How much flour do you need?

Answer: I need __________g of flour

Instructions: These questions are more challenging. Take your time and show all your working.

9. Extension Problem: A plant was 40cm tall. It grew by 15% in one month. What is its new height?

Answer: The plant is now __________cm tall

10. Reverse Problem: 30% of a number equals 24. What is the whole number?

Hint: If 30% = 24, what does 10% equal? Then what does 100% equal?

Answer: The whole number is __________

11. Explain in your own words: What does "percentage" mean and how do you calculate a percentage of a number?