How do you calculate taxable cost if total cost with tax is given?

Answer 1

I had to do this a couple of times, before I ignored the algebra and just went the easy way. C = P/1.06 Total Cost - Price = P Cost - In store cost = C Tax Rate = T C + T = P and T = C * .06 (or whatever your tax rate is) Substituting: C + (C * .06) = P 1C + .06C = P (Understood 1, base is the same, so you can add it together.) 1.06C = P C = P/1.06 Example, Total Cost - Price = $61.94, Tax Rate - T= .06, Find the original In Store Cost - C C = P/1.06 C = $61.94/1.06 C = $58.43 To Check, Original In Store Cost - C $58.43 * Tax Rate .06 = $3.51 Tax Add Cost to Tax = $58.43 + $3.51 = $61.94

Answer 2

To find the value of tax from the income, simply change the percentage into a decimal (25% to 0.25) and multiply that with your income.

if you want to find out how much the total is when you buy something.... Then add the answer you get from multiplying the payment with the percentage and add that to your how much you pay / subtract from your income.