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Math Help - [SOLVED] a tricky percentage and proportions problem

  1. #1
    Newbie mayta's Avatar
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    [SOLVED] a tricky percentage and proportions problem

    Fresh grapes contain 80% water by weight. dry grapes contain 15% water by weight.
    how many pounds of dry grapes can be obtained from 34 pounds of fresh grapes?
    (a) 8
    (b) 9
    (c) 10
    (d) 11
    (e) 12

    can anyone help me...thanx in advance
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  2. #2
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    skeeter's Avatar
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    Quote Originally Posted by mayta View Post
    Fresh grapes contain 80% water by weight. dry grapes contain 15% water by weight.
    how many pounds of dry grapes can be obtained from 34 pounds of fresh grapes?
    (a) 8
    (b) 9
    (c) 10
    (d) 11
    (e) 12

    can anyone help me...thanx in advance
    34 lbs of fresh grapes are 20% grape (no water) = 6.8 lbs

    dry grapes are 85% no water, so 85% of the dry grape weight = 6.8 lbs

    weight of dry grapes = 6.8/.85 = 8 lbs
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  3. #3
    Newbie mayta's Avatar
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    thanx so much man
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