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To compare the sizes of fractions, we need to find a common denominator. In this case, the least common multiple of 5 and 20 is 20. Converting four fifths to have a denominator of 20, we get 16/20. Comparing 16/20 to 17/20, we see that 17/20 is bigger than 16/20. Therefore, seventeen twentieths is bigger than four fifths.

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1mo ago

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Wiki User

13y ago

17/20 is larger than 4/5.

To compare fractions, put them both in a common denominator.

Here, you can multiply 4/5 by 4/4 (equality) to create the fraction 16/20.

17/20 > 16/20

You can create a common denominator for fractions (where one is not a factor of the other) by finding the Least Common Multiple : multiply their uncommon factors by their common factors.

Here, 20 is already a multiple of 5.

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Q: What is bigger four fifths or seventeen twentieths?
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