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43 votes
Sun lei bought a computer for $1800. The total cost, including tax, came to $1890. What is the tax rate?

User Rachel Fong
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1 Answer

13 votes
13 votes

Given:

Cost of computer without tax $1800.

Total cost including tax is $1890


\text{Tax amount =1890-1800}
\text{Tax amount = \$90}

Let the tax rate be x


90=1800*(x)/(100)
(90)/(18)=x
x=5

Tax rate is 5%

User David Mann
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3.0k points