Question

If you go out to eat with 3 friends and your meal was $72. 50, there is 6. 75% sales tax and you should tip the waiter 15%. How much should each person pay

Answer 1

we're making assumptions here, that each will pay evenly, and that the pay will include tax and tip split over 4.

well, the meal was $72.50, hopefully with Doritos, so how much is 6.75% of that?

`\begin{array}ll \cline{1-1} \textit{\textit{\LARGE a}\% of \textit{\LARGE b}}\\ \cline{1-1} \\ \left( \cfrac{\textit{\LARGE a}}{100} \right)\cdot \textit{\LARGE b} \\\\ \cline{1-1} \end{array}~\hspace{5em}\stackrel{\textit{6.75\% of 72.50}}{\left( \cfrac{6.75}{100} \right)72.50} ~~ \approx 4.89`

so the bill plus tax is 72.5 + 4.89 ≈ 77.39, now, how much is 15% of that?

`\stackrel{\textit{15\% of 77.39}}{\left( \cfrac{15}{100} \right)77.39} ~~ \approx ~~ 11.61\hspace{5em}\cfrac{\stackrel{ \textit{bill, tax \& tip} }{77.39~~ + ~~11.61}}{1+\underset{ friends }{3}} ~~ \approx ~~22.25 ~~ Each`