Grace goes out to lunch. The bill, before tax and tip, was $11.10. A sales tax of 7% was added on. Grace tipped 16% on the amount after the sales tax was added. How much was the sales tax? Round to the nearest cent.

Question

jsinrod · Answer

@hero

jsinrod · Answer

this is confusing

Hero · Answer

7% just means $\dfrac{7}{100}$

So to calculate the amount of the bill after ADDING sales tax, it's

BILL$+$ BILL $\times$ SALES TAX

Hero · Answer

Actually, they only want the sales tax so do this instead.

Hero · Answer

SALES TAX = PERCENTAGE $\times$ BILL

Hero · Answer

So:

SALES TAX = $\dfrac{7}{100} \times \left(11 + \dfrac{10}{100}\right)$

Hero · Answer

You can also simply use a calculator to find the answer:
Sales Tax = (0.07)(11.10)