Question

A restaurant advertises all meals 20%off menu price. You order a $12 burger and $4 fries. Sales tax is 7%. You tip 15% of your bill before tax . How much does your burger abs fries cost?

Answer 1

The price of the burger and fries is:

`12+4=16`

This is the cost at menu price, we need to find the discount by multiplying the cost by 20%:

`16*(20\%)/(100\%)=3.2`

Subtract the discount to the price:

`16-3.2=12.8`

This is the price you will pay after the discount.

Now, to find the tip, multiply this price by 15% and add it to the price:

`\begin{gathered} 12.8*(15\%)/(100\%)=1.92 \\ 12.8+1.92=14.72 \end{gathered}`

This is the bill by including the tip.

Finally, we need to find the sales tax by multiplying the bill by 7% and then add it to the bill:

`\begin{gathered} 14.72*(7\%)/(100\%)=1.03 \\ 14.72+1.03=15.75 \end{gathered}`

So, the burger and fries cost $15.75