What's a 20% Tip on a $89 Bill?

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Bill
$
Tip
%
Split? ways
Bill: $89.00
Tip: $17.80
Total: $106.80
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 $89.00 = 17.80 20% tip on $89.25 = 17.85 20% tip on $89.50 = 17.90 20% tip on $89.75 = 17.95
20% tip on $89.01 = 17.80 20% tip on $89.26 = 17.85 20% tip on $89.51 = 17.90 20% tip on $89.76 = 17.95
20% tip on $89.02 = 17.80 20% tip on $89.27 = 17.85 20% tip on $89.52 = 17.90 20% tip on $89.77 = 17.95
20% tip on $89.03 = 17.81 20% tip on $89.28 = 17.86 20% tip on $89.53 = 17.91 20% tip on $89.78 = 17.96
20% tip on $89.04 = 17.81 20% tip on $89.29 = 17.86 20% tip on $89.54 = 17.91 20% tip on $89.79 = 17.96
20% tip on $89.05 = 17.81 20% tip on $89.30 = 17.86 20% tip on $89.55 = 17.91 20% tip on $89.80 = 17.96
20% tip on $89.06 = 17.81 20% tip on $89.31 = 17.86 20% tip on $89.56 = 17.91 20% tip on $89.81 = 17.96
20% tip on $89.07 = 17.81 20% tip on $89.32 = 17.86 20% tip on $89.57 = 17.91 20% tip on $89.82 = 17.96
20% tip on $89.08 = 17.82 20% tip on $89.33 = 17.87 20% tip on $89.58 = 17.92 20% tip on $89.83 = 17.97
20% tip on $89.09 = 17.82 20% tip on $89.34 = 17.87 20% tip on $89.59 = 17.92 20% tip on $89.84 = 17.97
20% tip on $89.10 = 17.82 20% tip on $89.35 = 17.87 20% tip on $89.60 = 17.92 20% tip on $89.85 = 17.97
20% tip on $89.11 = 17.82 20% tip on $89.36 = 17.87 20% tip on $89.61 = 17.92 20% tip on $89.86 = 17.97
20% tip on $89.12 = 17.82 20% tip on $89.37 = 17.87 20% tip on $89.62 = 17.92 20% tip on $89.87 = 17.97
20% tip on $89.13 = 17.83 20% tip on $89.38 = 17.88 20% tip on $89.63 = 17.93 20% tip on $89.88 = 17.98
20% tip on $89.14 = 17.83 20% tip on $89.39 = 17.88 20% tip on $89.64 = 17.93 20% tip on $89.89 = 17.98
20% tip on $89.15 = 17.83 20% tip on $89.40 = 17.88 20% tip on $89.65 = 17.93 20% tip on $89.90 = 17.98
20% tip on $89.16 = 17.83 20% tip on $89.41 = 17.88 20% tip on $89.66 = 17.93 20% tip on $89.91 = 17.98
20% tip on $89.17 = 17.83 20% tip on $89.42 = 17.88 20% tip on $89.67 = 17.93 20% tip on $89.92 = 17.98
20% tip on $89.18 = 17.84 20% tip on $89.43 = 17.89 20% tip on $89.68 = 17.94 20% tip on $89.93 = 17.99
20% tip on $89.19 = 17.84 20% tip on $89.44 = 17.89 20% tip on $89.69 = 17.94 20% tip on $89.94 = 17.99
20% tip on $89.20 = 17.84 20% tip on $89.45 = 17.89 20% tip on $89.70 = 17.94 20% tip on $89.95 = 17.99
20% tip on $89.21 = 17.84 20% tip on $89.46 = 17.89 20% tip on $89.71 = 17.94 20% tip on $89.96 = 17.99
20% tip on $89.22 = 17.84 20% tip on $89.47 = 17.89 20% tip on $89.72 = 17.94 20% tip on $89.97 = 17.99
20% tip on $89.23 = 17.85 20% tip on $89.48 = 17.90 20% tip on $89.73 = 17.95 20% tip on $89.98 = 18.00
20% tip on $89.24 = 17.85 20% tip on $89.49 = 17.90 20% tip on $89.74 = 17.95 20% tip on $89.99 = 18.00