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Math Help - Population INcrease

  1. #1
    Junior Member Dragon's Avatar
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    Population INcrease

    A township's population increased from x thousand to x+y thousand Find the percent of the population increase
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  2. #2
    Super Member Aryth's Avatar
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    Quote Originally Posted by Dragon View Post
    A township's population increased from x thousand to x+y thousand Find the percent of the population increase
    To find the amount that the population increased, we subtract the original population from the new population:

    x + y - x = y

    We then plug it into a percent equation, which says, what percent of (x + y) is y, which is our increase:

    (x + y)*n = y

    (x + y)n = y

    n = y / (x + y)

    Where n is the percent increase, make sure you multiply n by 100 to get the decimal in terms of percentage, which makes your equation this:

    n = 100*(y) / (x + y)
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  3. #3
    Junior Member Dragon's Avatar
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    so the answer is 100/x??
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  4. #4
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by Dragon View Post
    so the answer is 100/x??
    No, the y's dont cancel, becuase the y at the bottom is a part of a sum not product
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