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Math Help - Very easy question, please help!

  1. #1
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    Very easy question, please help!

    Hello, I have a simple question (I hope!) with regard to a concept in investment management called "Maintenance Margin" I won't explain the theory, I just need to know how the equation is computed. Here it is:

    (100P-4,000) / 100P = .30

    The P will represent the stock price in which to make a margin call, and the answer should be $57.14 I just don't understand how the problem was computed. I tried multiplying both sides of the equation by 100P, to get rid of the fraction, but this does not seem to work. Please help, thanks!
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  2. #2
    A riddle wrapped in an enigma
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    Quote Originally Posted by kdogg121 View Post
    Hello, I have a simple question (I hope!) with regard to a concept in investment management called "Maintenance Margin" I won't explain the theory, I just need to know how the equation is computed. Here it is:

    (100P-4,000) / 100P = .30

    The P will represent the stock price in which to make a margin call, and the answer should be $57.14 I just don't understand how the problem was computed. I tried multiplying both sides of the equation by 100P, to get rid of the fraction, but this does not seem to work. Please help, thanks!
    Hi kdogg121,

    Your approach to the problem is correct.

    Multiply both sides by 100P.

    \frac{100P-4000}{100P}=.30

    100P-4000=30P

    Now subtract 30P from both sides.

    70P-4000=0

    Next, add 4000 to each side.

    70P=4000

    Finally, divide both sides by 70 to find P=57.14
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  3. #3
    Junior Member ursa's Avatar
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    Hello, I have a simple question (I hope!) with regard to a concept in investment management called "Maintenance Margin" I won't explain the theory, I just need to know how the equation is computed. Here it is:

    (100P-4,000) / 100P = .30

    The P will represent the stock price in which to make a margin call, and the answer should be $57.14 I just don't understand how the problem was computed. I tried multiplying both sides of the equation by 100P, to get rid of the fraction, but this does not seem to work. Please help, thanks!
    hi
    I am sorry but I don't understand what you want????
    if you want P=$57.14, then it is coming from the equation, simple calculation
    if you have any other doubt please be specific
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