Equivalent fractions, decimals and percentages

There are 20 NRICH Mathematical resources connected to Equivalent fractions, decimals and percentages
Terminating or not
problem

Terminating or not

Age
11 to 14
Challenge level
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Is there a quick way to work out whether a fraction terminates or recurs when you write it as a decimal?
Matching fractions
problem

Matching fractions

Age
7 to 11
Challenge level
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Can you find different ways of showing the same fraction? Try this matching game and see.
Bryony's Triangle
problem

Bryony's Triangle

Age
7 to 11
Challenge level
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Watch the video to see how to fold a square of paper to create a flower. What fraction of the piece of paper is the small triangle?
Pride of Place
problem

Pride of Place

Age
11 to 14
Challenge level
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Two fractions have been placed on a number line. Where should another fraction be placed?
Doughnut percents
problem

Doughnut percents

Age
7 to 14
Challenge level
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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 greedy algorithm
problem

the greedy algorithm

Age
11 to 14
Challenge level
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The Egyptians expressed all fractions as the sum of different unit fractions. The Greedy Algorithm might provide us with an efficient way of doing this.
Power match
problem

Power match

Age
16 to 18
Challenge level
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Can you locate these values on this interactive logarithmic scale?
Round and round and round
problem

Round and round and round

Age
11 to 14
Challenge level
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Where will the point stop after it has turned through 30 000 degrees? I took out my calculator and typed 30 000 ÷ 360. How did this help?
Fractions jigsaw
problem

Fractions jigsaw

Age
11 to 14
Challenge level
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A jigsaw where pieces only go together if the fractions are equivalent.
Fractional Wall
problem

Fractional Wall

Age
7 to 11
Challenge level
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Using the picture of the fraction wall, can you find equivalent fractions?