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Math Help - Fractions Reviews

  1. #1
    Junior Member
    Joined
    Feb 2008
    Posts
    25

    Fractions Reviews

    just having trouble understanding some things, no doubt you guys know it all...

    these are steps to make equivalent fractions, i don't understand this bit...
    • Form equivalent fractions by using the LCD
    • 13/4 = 65/20 and 3/5 = 12/20


    how is this possible, i'm not seeing where they got the 65
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  2. #2
    Newbie
    Joined
    Feb 2008
    Posts
    8
    13/4=65/20

    They multiplied top and bottom by 5 -

    (13/4)(5/5)=(13.5)/(4.5)=65/20

    When you multiply the top and bottom of a fraction by the same number, it is like multiplying it by 1 and so it is still equivalent to what you started with.
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