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Express as a Percentage

This self-marking quiz requires you to work out what one quantity is as a percentage of another.

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This is level 3; Express one quantity as a percentage of another quantity with different units. You can earn a trophy if you get at least 9 questions correct.

1. Express 128 centimetres as a percentage of 2 metres.	%
2. Express 342cm as a percentage of 4.5m.	%
3. Express 245mm as a percentage of 35cm.	%
4. Express 4050mm as a percentage of 4.5m.	%
5. Express 415m as a percentage of 4.15km.	%
6. Express 1710m as a percentage of 4.75km.	%
7. Express 15.2m as a percentage of 4750cm.	%
8. Express 780g as a percentage of 3.25kg.	%
9. Express 1302g as a percentage of 3.1kg.	%
10. A garden has an area of 1050m². Within the garden there is a flower bed in the shape of a rectangle 7m long and 3m wide. What percentage of the area of the garden is taken up by the flower bed?	%
11. A new healthy wedding cake is being sold in a shop. Each cake weighs 6kg and contains 360g of protein, 640g of fat and 5kg of carbohydrate. What percentage of protein does one wedding cake contain?	%
12. A bottle of Junky Cola contains one point five litres of the sugary, unhealthy drink. Winky Lash drinks a 30cl glass of Junky Cola. What percentage of the whole bottle is that?	%

This is Express as a Percentage level 3. You can also try:
Level 1 Level 2 Level 4

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.

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Description of Levels

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Level 1 - Express one number as a percentage of another.

Level 2 - Express one amount of money as a percentage of another.

Level 3 - Express one quantity as a percentage of another quantity with different units.

Level 4 - More difficult questions where the answers require rounding.

More on this topic including lesson Starters, visual aids, investigations and self-marking exercises.

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.

Curriculum Reference

See the National Curriculum page for links to related online activities and resources.

Help Video

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.

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