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Which equivalent fraction would you have to use in order to add 3/5 to 21/25

  • math -

    convert to common denominator

    least commmon multiple of 5 and 25 is 25

    so we want the fraction 3/5 to convert into the form x/25

    so, 3/5 = x/25

    we can cross multiply to get 5x = 25*3

    x = 5*3

    x= 15

    So the fraction would be 15/25

    Optional: adding 15/25 to 21/25 = 36/25 or 1 11/25

  • math -

    3/5 to 21/25

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