Dr Gulshan S. answered 02/01/17
Tutor
4.9
(52)
PhD In Physics and experience of teaching IB Physics and Math High sc
Supposing tip is calculated after adding tax
Bill = $152
Tax = 5.25 % = (152x5.25)/100
= 7.98
New amount =152+7.98
=159.98
Now 18% tip on this amount = (159.98 x 18)/100 =28.80
Final bill = $188.78
(Answer will change if tip is calculated before adding tax )