Explanation:
so if 33.00$ were 100% then you have to fund how many % is 35.31$
to do that you can just multiply 35.31$ to 100 and then divide it too 33.00$
that is 107 % and so
35.31 = 107%
33.00=100%
substract 107 from 100 and you get the tax rate
107-100=7 % tax
hope you understood :)