[tex]\large\underline{\mathbb{QUESTION}:}[/tex]
Mark took one of his friends out to dinner. The dinner cost $100 and he paid 3% sales tax. If Tommy left an 18% tip on the $100, how much in total did he pay?
[tex]\large\underline{\mathbb{ANSWER}:}[/tex]
[tex]\large\underline{\mathbb{SOLUTION}:}[/tex]
First find the tax. Write 3% as the decimal 0.03 before using it in the equation.
[tex]\blue{ \rule{178pt}{1pt}}[/tex]
tax = tax percentage × amount
= 0.03 × 100
= 3
[tex]\blue{ \rule{178pt}{1pt}}[/tex]
[tex]\blue{ \rule{178pt}{5pt}}[/tex]
Now find the tip. Write 18% as the decimal 0.18 before using it in the equation.
[tex]\blue{ \rule{178pt}{1pt}}[/tex]
tip = tip percentage × amount
= 0.18 × 100
= 18
[tex]\blue{ \rule{178pt}{1pt}}[/tex]
[tex]\blue{ \rule{178pt}{5pt}}[/tex]
Then finally, find the total cost:
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total cost = cost + tax + tip
= 100 + 3 + 18
= 121
[tex]\blue{ \rule{178pt}{1pt}}[/tex]
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