What is a sales tax decalculator?

- Step 1: take the total price and divide it by one plus the tax rate.
- Step 2: multiply the result from step one by the tax rate to get the dollars of tax.
- Step 3: subtract the dollars of tax from step 2 from the total price.
- Pre-Tax Price = TP – [(TP / (1 + r) x r]
- TP = Total Price.