The total cost which includes tip, food cost without tax and sales tax for the considered situation is 19.63 bucks approximately.
Suppose the value of which a thing is expressed in percentage is "a'
Suppose the percent that considered thing is of "a" is b%
Then since percent shows per 100 (since cent means 100), thus we will first divide the whole part in 100 parts and then we multiply it with b so that we collect b items per 100 items(that is exactly what b per cent means).
Thus, that thing in number is
[tex]\dfrac{a}{100} \times b[/tex]
For this case, we're specified that:
Pizza cost = 15.95 +7% of tax on 15.95 bucks
Tip = 15% of pizza cost
Total cost = Pizza cost + tip
7% of 15.95 is: [tex]\dfrac{15.95}{100} \times 7 = 1.1165[/tex] bucks
Thus, pizza cost = The (15.95 + 1.1165) = 17.0665
Tip price = 15% of 17.0665 = [tex]\dfrac{17.0665}{100} \times 15 \approx 2.56[/tex] bucks.
Thus, total cost ≈ 17.0665 + 2.56 ≈ 19.63 bucks
Learn more about percent here:
https://brainly.com/question/11549320
