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Math Help - 2 more percentage word problems..just don't get them!!!

  1. #1
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    Angry 2 more percentage word problems..just don't get them!!!

    1) If your salary of 40000 increases by 5% next year, increases by 2% the following year, and decreases by 5% the year after that, what will your annual salary be in three years (to the nearest dollar)

    2) If you have two mugs of hot chocolate, one that is 32% chocolate and the other 20% chocolate, how much of each would you need to make one cup that is 25% chocolate?

    Thanks a million!!!
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  2. #2
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    I'll tackle #2 in a more logical, less algebraic approach than your other questions in your other thread.

    You have 32% and 20% and you want to mix them to make 1 cup of 25%. Note that 25% is 5/12 of the way from 20 to 32. (32 - 20 = 12; 25 - 20 = 5). This means 5/12 of your mixture should be the 32% and 7/12 of the mixture should be the 20%. Makes sense - if you put equal amounts of each in, you'd get a percent right between the two, which is 26%. So, you want your chocolate not QUITE as strong (25% vs 26%), so use more of the weaker chocolate mix and less of the stronger.
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