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Math Help - Trying to work out percentage of a figure

  1. #1
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    Trying to work out percentage of a figure

    If you have 45 and want to work out the percentage of VAT @ 20% I know that you times it by 20 and divide it by 120 to give you the figure. I want to know how you come about that sum and how I would apply it to other figures for example 45 VAT of 25%.

    Hope my explanation makes sense.

    Many thanks
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  2. #2
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    Re: Trying to work out percentage of a figure

    Quote Originally Posted by mathsnumpty View Post
    If you have 45 and want to work out the percentage of VAT @ 20% I know that you times it by 20 and divide it by 120 to give you the figure.
    I have no clue what you mean by that! "Times" what by 20? to give you what figure? If the initial value was 45 and the tax is 20% of the value, then the actual amount of the tax is 45 time .20 (NOT 20) which is equal to 9. Then the price, with tax add, would be 45+ 9= 54. That is also 1.20 times 45.

    I want to know how you come about that sum and how I would apply it to other figures for example 45 VAT of 25%.
    Hope my explanation makes sense.

    Many thanks
    Not very much sense! Sounds to me like you are memorizing formulas (poorly) without understanding what is being done.
    What is "25% of 45? (That is the same as 0.25 times 45.) What do you get when you add that tax to 45?
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