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Griffin had dinner at his favorite Indian restaurant. The bill before tax came to $28.50. The tax rate is 9%. How much does Griffin pay after tax? Round your answer to the nearest cent (hundredth).

Sagot :

Problem

Griffin had dinner at his favorite Indian restaurant. The bill before tax came to $28.50. The tax rate is 9%. How much does Griffin pay after tax? Round your answer to the nearest cent (hundredth).​

Solution

For this case we can solve the problem with the following proportion rule:

[tex]\frac{28.50}{100}=\frac{x}{109}[/tex]

Where 100 represen the 100% of the price without taxes, then the price with taxes is x representing 109% and solving for x we got:

[tex]x=109\cdot\frac{28.50}{100}=31.065[/tex]

And the final answer rounded would be:

31.07$

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