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Thread: Math Formula for Percentage Raise?

  1. #1
    Chapter Master Karak Norn Clansman's Avatar
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    Math Formula for Percentage Raise?

    No idea where to ask for this so might as well drop a hook here:

    Does there exist a formula for the following raise in numbers?

    An increase in an old to a new number in which the difference between the old and the new equals 30% of the new number?

    E.g. 9 as an old number, to be raised to ???

    (Being a lifelong amateur at mathematics I'm not only inherently bad at it, but quickly forgets formulas learnt through hard study and much counting. As such it's possible I might have known the solution once upon a time, but no clue now.)

    Edit: Answer is old number divided by 0.7
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