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Math - missing fraction

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Please advise how it is I go about finding the missing fraction. I get so confused. The problem is: N-3/5=1/4

I know the LCD would be 20 but from there, I am lost. Thank you.

  • Math - missing fraction -

    To get equivalent fractions, multiply the numerator and the denominator by the same number.

    3/5
    20/5 = 4
    3 * 4 = 12
    3/5 = 12/20

    Do the same for 1/4

    http://www.mathsisfun.com/equivalent_fractions.html

  • Math - missing fraction -

    5/9

  • Math - missing fraction -

    if we multiply a fraction by itself and divide the product by its resiprocal then we get the fraction 512/27.which one of the following fraction is the original fraction

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