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Interest and Percentages Worksheet

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Interest and Percentages Worksheet worksheet preview

Interest and Percentages Worksheet

Calculator and percentage symbols

📊 Part 1: Percentage Calculations

1. Calculate the following percentages:

a) 25% of £120 = £_______

b) 15% of £80 = £_______

c) 6% of £250 = £_______

2. A jacket costs £60. The shop offers a 20% discount. How much is the discount?

Discount = £_______

3. Sarah earns £1,200 per month. She gets a 5% pay rise. How much extra will she earn each month?

Sentence starter: To find 5% of £1,200, I need to...

Extra earnings = £_______

💰 Part 2: Simple Interest

Remember: Simple Interest = P × r × t

Where P = principal amount, r = interest rate (as a decimal), t = time in years

4. Calculate the simple interest earned:

Principal = £500, Interest rate = 4% per year, Time = 3 years

Simple Interest = £_______

5. Tom saves £800 in a bank account that pays 2.5% simple interest per year. How much interest will he earn after 2 years?

Sentence starter: First, I convert 2.5% to a decimal: _______

Interest earned = £_______

Total amount after 2 years = £_______

📈 Part 3: Percentage Increase and Decrease

Formula: Percentage Change = (Change ÷ Original Value) × 100

6. A mobile phone's price increases from £300 to £360. Calculate the percentage increase.

Percentage increase = _______%

7. A car's value decreases from £15,000 to £12,000. Calculate the percentage decrease.

Step 1: Find the decrease = £_______

Step 2: Calculate (decrease ÷ original) × 100

Percentage decrease = _______%

8. Real-life application: Choose the best deal and explain your reasoning.

Deal A: Save £300 in an account with 3% simple interest for 4 years

Deal B: Save £300 in an account with 5% simple interest for 2 years

Deal A

Deal B

Show your working and explain your choice:

9. Challenge Extension: A shop increases all prices by 15%, then offers a 10% discount on the new prices. A item originally cost £40. What is the final price?

Final price = £_______

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