Question

The sale tax on a used car priced at $3000 is $213.00. What percent is the sales tax rate?

Answer 1

7.1%

Explanation:

Percent:

The word "percent" literally means "per cent" or "per hundred", it's a ratio. So if we want to find "60%" of a number, we can think of it as the ratio 60:100, which can be made into the fraction:
`(60)/(100) = 0.60`, and then from here, we can just multiply this by whatever number we want to find 60% of. So to convert a percent into decimal form, we just divide by 100.

Solving the Problem:

That means the following can be used to solve for the tax rate:

`3000*(P)/(100) = 213.00`

From here we can actually just combine the 3000 / 100 by cancelling out the zeroes. to get 30.

`30P = 213.00`

Now form here we can divide both sides by 30 to solve for P

`P=7.1`

So "P" or the tax rate is 7.1%