Luisa's restaurant and Bill comes to $75.50, and she leaves a 15% tip. What is Luisa's total restaurant bill?
multiply $75.50 by 0.15(15% in decimal form). then add the amount calculated to $75.50 and you get the final cost
if she leaves a 15% tip then the total bill is $86.83 when rounded. multiply 75.50 by 1.15.