On 11 Aug 2005 11:08:57 -0700, "Bradj2" <bradjones02@[EMAIL PROTECTED]
> wrote:
>Hi,
>
>My question relates to working backwards using percentages. I have an
>invoice that needs to be marked up by 5.25%. The figure we get paid is
>-5.25%.
>
>The subtotal figure is $1037.72 + 5.25% = Total $1,092.20 . If I minus
>5.25% the figure becomes $1,034.85. How would I work out increasing the
>$1092.20 so when 5.25% is deducted, we end up at the original $1037.72
>and not lose money.
>
You divide by 1.0525.
For simplicity, let's call x and y the two $ amounts.
y = x + 5.25% x,
which is equivalent to saying
y = x + 0.0525x
or
y = 1.0525 x.
Therefore, x = y/1.0525.
bob
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