[AccessD] A2003: Calculating tax amounts

Hi team

I have asked this years ago and can't find the answer nor the dB I performed it
on :-(

I need to know the inclusive and exclusive tax components of a given amount

Here in OZ the tax rate on goods and services is 10 percent

So if I have a $150 tax Exclusive amount then the Tax inclusive amount is $165 -
Simple

And whilst ever the tax rate is 10 percent I can divide by one 11th to get the
Tax Exclusive amount - no prob

But I had a formula from some lovely person on this list that allowed this to be
dynamically calculated regardless of the tax rate

Any clues?

Many thanks in advance

Darren