[tex]25.99 \times \frac{25}{100} = 6.4975 \: or \: 6.5[/tex]
thus meaning that $6.5 will be removed.
[tex]25.99 - 6.5 = 19.49[/tex]
the price before tax is now $19.49 or 19.5
now for the tax
[tex]19.49 \times 6\% = 1.1694 \: or \: 1.2[/tex]
now we add
[tex]19.49 + 1.2 = 20.69[/tex]
your total is $20.7