He harringtons go to a restaurant for lunch and their bill is $86.20. after 6.5% tax and tip, they pay a total of $100. if the harringtons were exceptionally with their service, decide if their tip reflected this. explain your reasoning.

Bill for lunch in the Restaurant=$86.20

Tax=6.5%

Total money paid by  Harringtons=86.20+86.20 =86.20+ 5.60

  =91.80 (approx)

Total Bill paid =$100

Amount paid as a tip=$100 - $ 91.80=$8.20

I think that Instead of paying currency in change ,Harringtons decide to give note.But Maths says something else

% of money paid as tip=

                                     9.5% (approx)

Which shows that they were pleased with the service.

y = 0.77(x)

step-by-step explanation:

the jacket retains this value after 23% cut or retains 77% of original value. plug original 87 jacket price for x and the remaining value should be y.