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Here are two methods:

1) Divide the numerator by the denominator. Compare the decimals. This can be done quickly with a calculator.

2) Convert both fractions to a common denominator. This need not be the least common denominator; for example, simply multiplying the two denominators gives you a common denominator, which is not necessarily the least common denominator. Then compare the numerators.


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11y ago

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The denominator of the fractions need to all be equal. Then you can just compare the numerator:

Example:

Which is bigger: 4/9 or 5/12

36 would be the least common multiple, but often times it's just easier to use the product of the denominators, especially by this case:

12 x 9 = 108


For 4/9 = ???/108, wemultipliedthe 9 by 12, and need to also multiply the 4 by 12.

4 x 12 = 48

Therefore: 4/9 = 48/108


For 5/12 = ???/108, wemultipliedthe 12 by 9, and need to also multiply the 5 by 9.

5 x 9 = 45

Therefore: 5/12 = 45/108


48/108 > 45/108, because 48 > 45

Therefore: 4/9 > 5/12

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11y ago
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Janette Vrana

Lvl 2
4y ago
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lets us use this, we use fraction strips and stack them. Then compare them!

The picture is the example:

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Greatshivam

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Daylan Park

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4y ago
the bottom number is smaller if the fraction is bigger

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Q: How do you know a fraction is bigger than another ones?
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