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3 September, 08:29

Maggie has 20 ribbons. Of them, 2/5 ribbons are polka dotted ribbons. How many ribbons are not polka dotted

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  1. 3 September, 08:51
    0
    X = the number of polka dotted ribbons

    X/20 = 2/5; using cross product find x

    5x=20 (2)

    5x=40

    5x/5=40/5

    X=8 there are 8 polka dotted ribbons

    So you minus 8 for 20 to find the number of left over ribbons that are not polka dotted

    20-8=12
  2. 3 September, 08:55
    0
    12. 2/5 of 20 is 8 that ARE polka dotted, therefore there are 12 that are not.
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