If ex.GST figure of 10% is 10 divide by 11, what would it be for 15 and 20%? Thanks.

Are you referring to the Australian Goods and Services Tax?

Hi Jen, thanks for your reply. I guess its for all percentages really AUS and NZ I worked it out for the ex.GST amounts i.e.:

10% = total/1.1

15% = total/1.15

20% = total/1.2But I still haven't worked out the simple equation to find the actual GST amount for 15 & 20% which is similar to the 10/11 equation...

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