maths x

heyy xx how do i sbtract fractions from each other eg. 7/9 - 1/2
please help xx

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  1. You must first find a common denominator. Usually, you try to find the smallest (or least) common denominator.

    In your example, the common denominator is 18 (9 * 2). You have to change your fractions to fit this new denominator.

    7/9 = 14/18 (We multiplied both the numerator and denominator by 2.)

    1/2 = 9/18 (We multiplied both the numerator and denominator by 2.)

    7/9 - 1/2
    14/18 - 9/18

    Now, subtract the numerators and keep the denominator. Then simplify, if possible.

    For example, 4/9 - 1/9 = 3/9 = 1/3.

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  2. Oops, that should read...

    1/2 = 9/18 (We multiplied both the numerator and denominator by 9.)

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