Equivalent fractions, decimals and percentages

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

Tiny Nines
problem
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Tiny nines

Age
14 to 16
Challenge level
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What do you notice about these families of recurring decimals?
Repetitiously
problem
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Repetitiously

Age
14 to 16
Challenge level
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Can you express every recurring decimal as a fraction?
Sept 03
problem
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Sept 03

Age
11 to 14
Challenge level
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What is the last digit of the number 1 / 5^903 ?
Fractional Triangles
problem
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Fractional triangles

Age
7 to 11
Challenge level
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Use the lines on this figure to show how the square can be divided into 2 halves, 3 thirds, 6 sixths and 9 ninths.

Fractional Wall
problem
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Fractional wall

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

Fractions jigsaw
problem
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Fractions jigsaw

Age
11 to 14
Challenge level
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A jigsaw where pieces only go together if the fractions are equivalent.
Round and round and round
problem
Favourite

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?