Final answer:
The final percent change between the original bill amount and the total amount paid by Eva, including tax and tip, is 20.2% after rounding to the nearest tenth of a percent.
Step-by-step explanation:
Calculating Final Percent Change
To determine the final percent change between the original amount of Eva's bill and the amount paid with tax and tip, we will perform several calculations step by step.
- First, calculate the sales tax: $12.45 × 0.045 = $0.56.
- Add the sales tax to the original bill: $12.45 + $0.56 = $13.01.
- Calculate the tip amount: $13.01 × 0.15 = $1.95.
- Add the tip to the bill with tax: $13.01 + $1.95 = $14.96.
- Finally, calculate the percent change. The increase is $14.96 - $12.45 = $2.51. To find the percent increase: ($2.51 / $12.45) × 100 = 20.16%.
After rounding to the nearest tenth of a percent, the final percent change is 20.2%.