Quandaries and Queries


Hi.  I am not a student, I actually own a business.  I have been looking through an old algebra book and cannot come up with a formula for the problem I have.  I hope you can/will help me.
I know my total sales for the month, which includes sales tax.  How do I get to the sales dollars before the sales tax?
Here are the totals:
Total sales with sales tax $17,856.64
Sales Tax rate is 6.5%
How do I calculate the sales total before tax? 
Thank you,


Hi Lynda,

If you knew the sales before the tax and you wanted to calculate the sales including tax then you would calculate

sales including tax = (sales before tax) 1.065

That is

$17,856.64 = (sales before tax) 1.065


 $17,856.64/1.065 = sales before tax


sales before tax = $16766.80



Go to Math Central