Explanation:
does this mean the sale price includes the tax already ?
then we need to find 13% of the original price before taxes.
that would be done by saying that $101.94 are actuality 113% of the original price (original price = 100%, and then 13% are added).
101.94 = 113%
1% = 101.94/113
13% = 101.94 × 13/113 ≈ $11.73
that means it of the total sales price of $101.94, $11.73 would be the included taxes.
but if this means that 101.94 = 100% of the original price before taxes, we need to calculate the 13% based on that
101.94 = 100%
1% = 101.94/100
13% = 101.94 × 13/100 ≈ $13.25
and then the total price to be paid is
101.94 + 13.25 = $115.19