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Math Help - Compound interest

  1. #1
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    Smile Compound interest





    The formula A=p(1 + R/100) raised to n
    i ned to get only the R t left side an rest to the right..
    Plz help
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  2. #2
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    You start off with:
      P\left(1+\frac{R}{100}\right)^n = A
     \left(1+\frac{R}{100}\right)^n = \frac{A}{P}
    Root both sides by n
     1+\frac{R}{100} = \sqrt[n]{\frac{A}{P}}
    \frac{R}{100} = \sqrt[n]{\frac{A}{P}} -1
     R = 100\sqrt[n]{\frac{A}{P}} -100
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