Question
Estimating a tip without a calculator Estimate a \( 15 \% \) tip on a dinner bill of \( \$ 68.11 \) by first rounding the bill amount to the nearest ten dollars. Estimated tip: \( \$ \square \)
Ask by Tucker Willis. in the United States
Feb 27,2025
Upstudy AI Solution
Tutor-Verified Answer
Answer
The estimated tip is \$10.50.
Solution
To estimate a \( 15\% \) tip on a dinner bill of \( \$ 68.11 \), we can follow these steps:
1. **Round the bill amount**: The bill amount is \( \$ 68.11 \). Rounding this to the nearest ten dollars gives us \( \$ 70 \).
2. **Calculate \( 15\% \) of the rounded amount**: To find \( 15\% \) of \( \$ 70 \), we can break it down as follows:
- First, find \( 10\% \) of \( \$ 70 \):
\[
10\% \text{ of } 70 = \frac{70}{10} = 7
\]
- Next, find \( 5\% \) of \( \$ 70 \):
\[
5\% \text{ of } 70 = \frac{70}{20} = 3.5
\]
- Now, add \( 10\% \) and \( 5\% \) to get \( 15\% \):
\[
15\% \text{ of } 70 = 7 + 3.5 = 10.5
\]
3. **Final estimated tip**: Therefore, the estimated tip is approximately \( \$ 10.50 \).
So, the estimated tip is \( \$ \square 10.50 \).
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Simplify this solution Mind Expander
To estimate a 15% tip on a dinner bill of $68.11, first round the bill to the nearest ten dollars. In this case, $68.11 rounds up to $70. Now, calculating 15% can be simplified. Take 10% of $70, which is $7, and then find 5% (half of 10%), which is $3.50. Adding these together, you get $7 + $3.50 = $10.50. So, your estimated tip is about $10.50. By rounding to the nearest ten, you keep the math simple and quick, perfect for situations without a calculator. It's all about making fractions work for you! So next time you’re dining out, don’t be shy to round it up and make tipping a breeze!
