Question

Sun lei bought a laptop computer for $1500. The total cost, including tax, came $1590. What is the tax rate?

Answer 1

We know that Sun lei bought a laptop computer for $1500 and the total cost, including tax, came $1590.

And we must find the tax rate.

If the total cost was $1590 and the laptop cost was $1500, then the cost of the tax is

`\text{tax}=1590-1500=90`

Now, We must find what percentage represents $ 90 within $ 1500 and that will be the tax rate

`\text{ tax rate}=(90)/(1500)\cdot100\text{ \%}=0.06\cdot100\text{ \%}=6\text{ \%}`

Finally, the tax rate is 6%