Reverse Percentages & Simple Interest (Year 8)
Free printable UK Year 8 (Key Stage 3) maths worksheet: work backward from a percentage change to find the original amount, and calculate simple interest.
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Grade 7 · Math worksheet
Name
Date
Math
Reverse Percentages & Simple Interest
Work backward from a percentage change to find the original amount, or calculate simple interest.
- 1.After a 60% increase, a laptop's price is £8. Find the original price.
- 2.After a 20% decrease, a laptop's price is £32. Find the original price.
- 3.After a 90% increase, a laptop's price is £209. Find the original price.
- 4.After a 15% increase, a laptop's price is £322. Find the original price.
- 5.After a 30% increase, a laptop's price is £195. Find the original price.
- 6.£450 is invested at a simple interest rate of 2% per year. Find the total amount after 2 years.
- 7.£75 is invested at a simple interest rate of 4% per year. Find the total amount after 2 years.
- 8.£75 is invested at a simple interest rate of 8% per year. Find the total amount after 3 years.
- 9.£225 is invested at a simple interest rate of 8% per year. Find the total amount after 2 years.
- 10.£50 is invested at a simple interest rate of 2% per year. Find the total amount after 5 years.
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