# Thread: Trying to work out percentage of a figure

1. ## 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

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

Originally Posted by mathsnumpty
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£?