Transum Software

Percentage Change

Test your understanding of using percentages with this self marking quiz about percentage change.

Level 1 Level 2 Level 3 Level 4 Level 5 Level 6 Exam-Style Description Help More Percentages

This is level 4: find the percentage decrease given the original and final values. You can earn a trophy if you get at least 7 questions correct. You can use a calculator.

If 100 decreases to 85, by what percentage has it decreased? % Correct Wrong

Find the percentage decrease if 40 is reduced to 16. % Correct Wrong

If 160 decreases to 120, by what percentage has it decreased? % Correct Wrong

Find the percentage decrease if 20 is reduced to 10. % Correct Wrong

Yesterday 1000 flies were eaten by frogs in the park. Today the number of flies decreased to 960 flies. By what percentage has the number of flies eaten decreased?
 FlyFlyFlyFlyFlyFlyFlyFly
% Correct Wrong

By what percentage is 328 less than 400? % Correct Wrong

Find the percentage decrease if a computer game score of 300 is reduced to 222 due to penalty points. % Correct Wrong

5240 people entered the Trantown Marathon this year. That's a decrease on last year's entries. Last year 13100 people entered. What percentage has the number of entries decreased from last year to this year? % Correct Wrong

The number of people watching the Cliff Diving Monkeys YouTube video on the first day was 34400. On the second day the number of people viewing it was reduced to 15824. What is this reduction expressed as a percentage? % Correct Wrong

This year only 46375 peopled auditioned for Z Factor compared to 87500 last year. By what percentage has the number of people decreased since last year? % Correct Wrong

Check

This is Percentage Change level 4. You can also try:
Level 1 Level 2 Level 3 Level 5 Level 6

Instructions

Try your best to answer the questions above. Type your answers into the boxes provided leaving no spaces. As you work through the exercise regularly click the "check" button. If you have any wrong answers, do your best to do corrections but if there is anything you don't understand, please ask your teacher for help.

When you have got all of the questions correct you may want to print out this page and paste it into your exercise book. If you keep your work in an ePortfolio you could take a screen shot of your answers and paste that into your Maths file.

Transum.org

This web site contains over a thousand free mathematical activities for teachers and pupils. Click here to go to the main page which links to all of the resources available.

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Featured Activity

Hi-Low Predict

Hi-Low Predict

A version of the Play Your Cards Right TV programme. Calculate the probabilities of cards being higher or lower than the one shown. a fun way to practise applying probability and using fractions.

Answers

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Go Maths

Learning and understanding Mathematics, at every level, requires learner engagement. Mathematics is not a spectator sport. Sometimes traditional teaching fails to actively involve students. One way to address the problem is through the use of interactive activities and this web site provides many of those. The Go Maths page is an alphabetical list of free activities designed for students in Secondary/High school.

Maths Map

Are you looking for something specific? An exercise to supplement the topic you are studying at school at the moment perhaps. Navigate using our Maths Map to find exercises, puzzles and Maths lesson starters grouped by topic.

Teachers

If you found this activity useful don't forget to record it in your scheme of work or learning management system. The short URL, ready to be copied and pasted, is as follows:

Do you have any comments? It is always useful to receive feedback and helps make this free resource even more useful for those learning Mathematics anywhere in the world. Click here to enter your comments.

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Description of Levels

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Simple Percentages

Level 1 - Find the new amount after a percentage increase.

Level 2 - Find the new amount after a percentage decrease.

Level 3 - Find the percentage increase given the original and final values.

Level 4 - Find the percentage decrease given the original and final values.

Level 5 - Find the original amount after a percentage increase or decrease given the final value.

Level 6 - Mixed questions.

Exam Style questions are in the style of GCSE or IB/A-level exam paper questions and worked solutions are available for Transum subscribers.

Answers to this exercise are available lower down this page when you are logged in to your Transum account. If you don’t yet have a Transum subscription one can be very quickly set up if you are a teacher, tutor or parent.

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Example

This video is from the excellent Corbettmaths.

You may want to use a calculator for some of the questions. See Calculator Workout skill 3.

Don't wait until you have finished the exercise before you click on the 'Check' button. Click it often as you work through the questions to see if you are answering them correctly.

Answers to this exercise are available lower down this page when you are logged in to your Transum account. If you don’t yet have a Transum subscription one can be very quickly set up if you are a teacher, tutor or parent.

Log in Sign up

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