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Comparing fractions.

Comparing fractions with a common denominator

Definition.
To compare fraction with the common denominators (bottom number of a fraction) you need to compare numerators and to see which fraction is greater.

Example of comparing fractions with the common denominators:

Example 1.
3 < 4
77
Example 2.
7 > 6
1111

Comparing fractions with a common numerator

Definition.
The fraction with the smallest denominator is the larger fraction if the numerators are the same.

Example of comparing fractions with the common numerator:

Example 3.
4 > 4
79
Example 4.
1 < 1
3120

Comparing fractions

Definition.
To compare fractions with different denominators you need to make them the same finding the least common multiple (LCM) of the denominators (which is called the Least Common Denominator). Then to compare numerators and to see which fraction is greater.

Example of comparing fractions:

Example 5.
8 ? 5
96

to reduce fractions to a common denominator

16 ? 15
1818

as 16 > 15, then

8 > 5
96
Example 6.
3 ? 9
720

to reduce fractions to a common denominator

60 ? 63
140140

as 60 < 63, then

3 < 9
720

See also:

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