# 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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dieseisB

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