Subtracting Fractions with Unlike Denominators

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     Subtracting Fractions with unlike denominators is exactly the same as adding fractions with unlike denominators. 

    If fractions have the same denominator you can add or subtract normally. 

                                        2/3 - 1/3 = 1/3

    If you take a look you can see the denominator does not change, though the numerator does. 

    Though if the denominator is not the same you have to change it. Example:

                                        5/6 - 1/3 

    The denominator is not the same so, first thing we must do is find the lowest common multiple

                       Multiples of 3 - 3, 6, 9, 12, 15

                        Multiples of 6 - 6, 12, 18, 24, 30

    6 is the lowest common multiple. We have to change 1/3 so it has a denominator of 6. What do you multiply 3 by to make 6? The answer is 2. 

    1/3 * 2/2 because what you do to the bottom you do to the top.

    1/3 * 2/2 = 2/6

    Now we can subtract. 5/6 - 2/6

    What is the answer? 

    Please answer the questions below. 

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