The price of a family dinner was $48.00. A sales tax added 5% to the final bill. The family left a $10.08 tip. If the family included the sales tax when calculating the tip, what percent did the family leave? A. 2% B. 10% C. 18% D. 20%

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The price of a family dinner was $48.00. A sales tax added 5% to the final bill. The family left a $10.08 tip. If the family included the sales tax when calculating the tip, what percent did the family leave? A. 2% B. 10% C. 18% D. 20%

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Answer 1

The sales tax is $\displaystyle{0.05}{\left(\${48.00}\right)}=\${2.40}$ so the total considered by the family was $\displaystyle\${48.00}+\${2.40}=\${50.40}$. So, the family left a tip of:
$\displaystyle\$\frac{{10.08}}{\$}{50.40}={0.2}={20}\%$
The answer is D.

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The price of a family dinner was $48.00. A sales tax added 5% to the final bill. The family left a $10.08 tip. If the family included the sales tax when calculating the tip, what percent did the family leave? A. 2% B. 10% C. 18% D. 20%

The price of a family dinner was $48.00. A sales tax added 5% to the final bill. The family left a $10.08 tip. If the family included the sales tax when calculating the tip, what percent did the family leave? A. 2% B. 10% C. 18% D. 20%

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