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The activities linked to these SAT Maths topics are existing Transum resources, not exercises specifically designed for the SAT examination. They use British English and may include questions or difficulty levels beyond and adjacent to those required for the SAT.

• Percentage Change Video When you have mastered working out percentages you can then apply that skill to calculating percentage increase, decrease and reverse percentages.
• Percentage Change Test your understanding of using percentages with this self marking quiz about percentage change.
• Mandy's Matching Mandy invites you to match the question with the matching percentages description.
• Percentage Switch Practise percentage increase and decrease calculations by completing this table.
• Interest Practise using the formulas for simple interest and compound interest.
• Interest Video Learn about simple interest, compound interest, appreciation and depreciation. This video is to help you do the online, self-marking exercise.
• Compound Interest Calculator A customised online calculator for quickly finding the solutions to compound interest problems.
• Overdraft Charges Do you understand how your bank charges you for taking out an overdraft? Try this self marking quiz.
• Two-Step Percentages An exercise in which each problem requires two percentage calculations to find the solution.

Here are some exam-style questions (not SAT questions) on this topic:

• "(a) In an election, David Linewhip gained 27 552 votes out of a total of 43 715 votes. Write 27 552 as a percentage of 43 715 giving your answer to the nearest integer." ... more
• "Leila buys a new washing machine, hoping it will cope with the mysterious mountain of socks that appears in her laundry basket every week." ... more
• "In 2009 the price of a Big Mac was £2.29." ... more
• "In a sale, the original price of a coffee grinder is reduced by £14." ... more
• "Davy Browning buys a premium skateboard." ... more
• "(a) Davy Browning earns £54000 per year before paying tax.
  He pays tax on his earnings at a rate of 18%.
  Calculate the amount Davy has after paying tax." ... more
• "(a) Audrey, Seymore and Mr Mushnic share potted plants in the ratio Audrey : Seymore : Mr Mushnic = 3 : 4 : 7. Seymore receives 12 plants. Calculate the total number of plants shared." ... more
• "The value of a new car is £22 000." ... more
• "Windthrup bought a car for £9500 which depreciated by 6% in the first year and 3.5% in the second year." ... more
• "Zoe invests £5000 in an account for one year. At the end of the year, interest is added to her account." ... more
• "Sue Perlative invests £1750 at a rate of \( r \% \) per year compound interest." ... more
• "Montague invests £7000 for six years in a bank offering compound interest at \(x%\) per annum." ... more
• "John times how long it takes him to run around Hazelnut Park each Friday afternoon. The last three weeks his times, rounded to the nearest minute are \(p, q \; \text{and} \; r\)." ... more

See all these questions