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Subtracting Fractions with Like Denominators

Fractions with the same denominators are called like fractions.

To subtract fractions with like denominators, subtract the numerators , and write the difference over the denominator.

5 7 4 7 = 1 7

Example :

Find 4 5 2 5 .

Since the denominators are the same, subtract the numerators.

= 4 2 5

= 2 5

 

You may get an answer which is not in lowest terms , even if the fractions you were adding and subtracting both were. In this case, you have to reduce the fraction .

8 9 2 9 = 6 9 = 6 ÷ 3 9 ÷ 3 = 2 3