Resources tagged with: Percentages

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There are 15 NRICH Mathematical resources connected to Percentages, you may find related items under Fractions, Decimals, Percentages, Ratio and Proportion.

Broad Topics > Fractions, Decimals, Percentages, Ratio and Proportion > Percentages

Doughnut Percents

Age 7 to 14Challenge Level

A task involving the equivalence between fractions, percentages and decimals which depends on members of the group noticing the needs of others and responding.

The Legacy

Age 14 to 16Challenge Level

Your school has been left a million pounds in the will of an ex- pupil. What model of investment and spending would you use in order to ensure the best return on the money?

Age 14 to 16Challenge Level

If a sum invested gains 10% each year how long before it has doubled its value?

A Change in Code

Age 14 to 16Challenge Level

There are two sets of numbers. The second is the result of the first after an increase by a constant percentage. How can you find that percentage if one set of numbers is in code?

Fractions and Percentages Card Game

Age 11 to 16Challenge Level

Can you find the pairs that represent the same amount of money?

Matching Fractions, Decimals and Percentages

Age 7 to 14Challenge Level

Can you match pairs of fractions, decimals and percentages, and beat your previous scores?

Mathland Election

Age 11 to 14Challenge Level

A political commentator summed up an election result. Given that there were just four candidates and that the figures quoted were exact find the number of votes polled for each candidate.

Pineapple Juice

Age 14 to 16 ShortChallenge Level

What percentage of this orange drink is juice?

Trusting the Tabloids

Age 11 to 16Challenge Level

Can you match the cards and figure out whether the tabloid headlines can be trusted?

Age 11 to 14Challenge Level

When Charlie retires, he's looking forward to the quiet life, whereas Alison wants a busy and exciting retirement. Can you advise them on where they should go?

Roasting Old Chestnuts 4

Age 11 to 16

For teachers. Yet more school maths from long ago-interest and percentages.

Put Out the Flags

Age 11 to 14Challenge Level

Tim and Beth both have a string of flags. Use the percentages to find out who has the most flags.

Round and Round

Age 14 to 16Challenge Level

Prove that the shaded area of the semicircle is equal to the area of the inner circle.

Circle Packing

Age 14 to 16Challenge Level

Equal circles can be arranged so that each circle touches four or six others. What percentage of the plane is covered by circles in each packing pattern? ...

Percentage Unchanged

Age 14 to 16 ShortChallenge Level

If the base of a rectangle is increased by 10% and the area is unchanged, by what percentage is the width decreased by ?