What's a 30% Tip on a $42 Bill?

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Bill
$
Tip
%
Split? ways
Bill: $42.00
Tip: $12.60
Total: $54.60
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 30 percent tip by bill amount? What should I tip if I want to leave 30? What's the total?
30% tip on $42.00 = 12.60 30% tip on $42.25 = 12.68 30% tip on $42.50 = 12.75 30% tip on $42.75 = 12.83
30% tip on $42.01 = 12.60 30% tip on $42.26 = 12.68 30% tip on $42.51 = 12.75 30% tip on $42.76 = 12.83
30% tip on $42.02 = 12.61 30% tip on $42.27 = 12.68 30% tip on $42.52 = 12.76 30% tip on $42.77 = 12.83
30% tip on $42.03 = 12.61 30% tip on $42.28 = 12.68 30% tip on $42.53 = 12.76 30% tip on $42.78 = 12.83
30% tip on $42.04 = 12.61 30% tip on $42.29 = 12.69 30% tip on $42.54 = 12.76 30% tip on $42.79 = 12.84
30% tip on $42.05 = 12.62 30% tip on $42.30 = 12.69 30% tip on $42.55 = 12.77 30% tip on $42.80 = 12.84
30% tip on $42.06 = 12.62 30% tip on $42.31 = 12.69 30% tip on $42.56 = 12.77 30% tip on $42.81 = 12.84
30% tip on $42.07 = 12.62 30% tip on $42.32 = 12.70 30% tip on $42.57 = 12.77 30% tip on $42.82 = 12.85
30% tip on $42.08 = 12.62 30% tip on $42.33 = 12.70 30% tip on $42.58 = 12.77 30% tip on $42.83 = 12.85
30% tip on $42.09 = 12.63 30% tip on $42.34 = 12.70 30% tip on $42.59 = 12.78 30% tip on $42.84 = 12.85
30% tip on $42.10 = 12.63 30% tip on $42.35 = 12.71 30% tip on $42.60 = 12.78 30% tip on $42.85 = 12.86
30% tip on $42.11 = 12.63 30% tip on $42.36 = 12.71 30% tip on $42.61 = 12.78 30% tip on $42.86 = 12.86
30% tip on $42.12 = 12.64 30% tip on $42.37 = 12.71 30% tip on $42.62 = 12.79 30% tip on $42.87 = 12.86
30% tip on $42.13 = 12.64 30% tip on $42.38 = 12.71 30% tip on $42.63 = 12.79 30% tip on $42.88 = 12.86
30% tip on $42.14 = 12.64 30% tip on $42.39 = 12.72 30% tip on $42.64 = 12.79 30% tip on $42.89 = 12.87
30% tip on $42.15 = 12.65 30% tip on $42.40 = 12.72 30% tip on $42.65 = 12.80 30% tip on $42.90 = 12.87
30% tip on $42.16 = 12.65 30% tip on $42.41 = 12.72 30% tip on $42.66 = 12.80 30% tip on $42.91 = 12.87
30% tip on $42.17 = 12.65 30% tip on $42.42 = 12.73 30% tip on $42.67 = 12.80 30% tip on $42.92 = 12.88
30% tip on $42.18 = 12.65 30% tip on $42.43 = 12.73 30% tip on $42.68 = 12.80 30% tip on $42.93 = 12.88
30% tip on $42.19 = 12.66 30% tip on $42.44 = 12.73 30% tip on $42.69 = 12.81 30% tip on $42.94 = 12.88
30% tip on $42.20 = 12.66 30% tip on $42.45 = 12.74 30% tip on $42.70 = 12.81 30% tip on $42.95 = 12.89
30% tip on $42.21 = 12.66 30% tip on $42.46 = 12.74 30% tip on $42.71 = 12.81 30% tip on $42.96 = 12.89
30% tip on $42.22 = 12.67 30% tip on $42.47 = 12.74 30% tip on $42.72 = 12.82 30% tip on $42.97 = 12.89
30% tip on $42.23 = 12.67 30% tip on $42.48 = 12.74 30% tip on $42.73 = 12.82 30% tip on $42.98 = 12.89
30% tip on $42.24 = 12.67 30% tip on $42.49 = 12.75 30% tip on $42.74 = 12.82 30% tip on $42.99 = 12.90