What's a 20% Tip on a $81 Bill?

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Bill
$
Tip
%
Split? ways
Bill: $81.00
Tip: $16.20
Total: $97.20
North American Tipping Guide
Restaurant
15-20% of the bill, including drinks.
Taxi
10% unless their credit card machine is "broken", then no tip.
Uber
It is now possible to tip using the app. Most people don't tip, so a small tip would be very appreciated.
Hair Salon
15-20%
Pizza
A few dollars
Room Service
A few dollars
Hotel Maid
$2 per day, or more if your room is messy. These are some of the lowest-paid employees, so tipping is a very nice gesture.
Tour Guide
If you really enjoyed the tour, then tip 5 or 10 dollars for your entire party.
How much? What is a 20 percent tip by bill amount? What should I tip if I want to leave 20? What's the total?
20% tip on $81.00 = 16.20 20% tip on $81.25 = 16.25 20% tip on $81.50 = 16.30 20% tip on $81.75 = 16.35
20% tip on $81.01 = 16.20 20% tip on $81.26 = 16.25 20% tip on $81.51 = 16.30 20% tip on $81.76 = 16.35
20% tip on $81.02 = 16.20 20% tip on $81.27 = 16.25 20% tip on $81.52 = 16.30 20% tip on $81.77 = 16.35
20% tip on $81.03 = 16.21 20% tip on $81.28 = 16.26 20% tip on $81.53 = 16.31 20% tip on $81.78 = 16.36
20% tip on $81.04 = 16.21 20% tip on $81.29 = 16.26 20% tip on $81.54 = 16.31 20% tip on $81.79 = 16.36
20% tip on $81.05 = 16.21 20% tip on $81.30 = 16.26 20% tip on $81.55 = 16.31 20% tip on $81.80 = 16.36
20% tip on $81.06 = 16.21 20% tip on $81.31 = 16.26 20% tip on $81.56 = 16.31 20% tip on $81.81 = 16.36
20% tip on $81.07 = 16.21 20% tip on $81.32 = 16.26 20% tip on $81.57 = 16.31 20% tip on $81.82 = 16.36
20% tip on $81.08 = 16.22 20% tip on $81.33 = 16.27 20% tip on $81.58 = 16.32 20% tip on $81.83 = 16.37
20% tip on $81.09 = 16.22 20% tip on $81.34 = 16.27 20% tip on $81.59 = 16.32 20% tip on $81.84 = 16.37
20% tip on $81.10 = 16.22 20% tip on $81.35 = 16.27 20% tip on $81.60 = 16.32 20% tip on $81.85 = 16.37
20% tip on $81.11 = 16.22 20% tip on $81.36 = 16.27 20% tip on $81.61 = 16.32 20% tip on $81.86 = 16.37
20% tip on $81.12 = 16.22 20% tip on $81.37 = 16.27 20% tip on $81.62 = 16.32 20% tip on $81.87 = 16.37
20% tip on $81.13 = 16.23 20% tip on $81.38 = 16.28 20% tip on $81.63 = 16.33 20% tip on $81.88 = 16.38
20% tip on $81.14 = 16.23 20% tip on $81.39 = 16.28 20% tip on $81.64 = 16.33 20% tip on $81.89 = 16.38
20% tip on $81.15 = 16.23 20% tip on $81.40 = 16.28 20% tip on $81.65 = 16.33 20% tip on $81.90 = 16.38
20% tip on $81.16 = 16.23 20% tip on $81.41 = 16.28 20% tip on $81.66 = 16.33 20% tip on $81.91 = 16.38
20% tip on $81.17 = 16.23 20% tip on $81.42 = 16.28 20% tip on $81.67 = 16.33 20% tip on $81.92 = 16.38
20% tip on $81.18 = 16.24 20% tip on $81.43 = 16.29 20% tip on $81.68 = 16.34 20% tip on $81.93 = 16.39
20% tip on $81.19 = 16.24 20% tip on $81.44 = 16.29 20% tip on $81.69 = 16.34 20% tip on $81.94 = 16.39
20% tip on $81.20 = 16.24 20% tip on $81.45 = 16.29 20% tip on $81.70 = 16.34 20% tip on $81.95 = 16.39
20% tip on $81.21 = 16.24 20% tip on $81.46 = 16.29 20% tip on $81.71 = 16.34 20% tip on $81.96 = 16.39
20% tip on $81.22 = 16.24 20% tip on $81.47 = 16.29 20% tip on $81.72 = 16.34 20% tip on $81.97 = 16.39
20% tip on $81.23 = 16.25 20% tip on $81.48 = 16.30 20% tip on $81.73 = 16.35 20% tip on $81.98 = 16.40
20% tip on $81.24 = 16.25 20% tip on $81.49 = 16.30 20% tip on $81.74 = 16.35 20% tip on $81.99 = 16.40