Question

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).

Answer 1

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:

`(28.50)/(100)=(x)/(109)`

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:

`x=109\cdot(28.50)/(100)=31.065`

And the final answer rounded would be:

31.07$