What's a 30% Tip on a $40 Bill?

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Bill
$
Tip
%
Split? ways
Bill: $40.00
Tip: $12.00
Total: $52.00
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 $40.00 = 12.00 30% tip on $40.25 = 12.08 30% tip on $40.50 = 12.15 30% tip on $40.75 = 12.23
30% tip on $40.01 = 12.00 30% tip on $40.26 = 12.08 30% tip on $40.51 = 12.15 30% tip on $40.76 = 12.23
30% tip on $40.02 = 12.01 30% tip on $40.27 = 12.08 30% tip on $40.52 = 12.16 30% tip on $40.77 = 12.23
30% tip on $40.03 = 12.01 30% tip on $40.28 = 12.08 30% tip on $40.53 = 12.16 30% tip on $40.78 = 12.23
30% tip on $40.04 = 12.01 30% tip on $40.29 = 12.09 30% tip on $40.54 = 12.16 30% tip on $40.79 = 12.24
30% tip on $40.05 = 12.02 30% tip on $40.30 = 12.09 30% tip on $40.55 = 12.17 30% tip on $40.80 = 12.24
30% tip on $40.06 = 12.02 30% tip on $40.31 = 12.09 30% tip on $40.56 = 12.17 30% tip on $40.81 = 12.24
30% tip on $40.07 = 12.02 30% tip on $40.32 = 12.10 30% tip on $40.57 = 12.17 30% tip on $40.82 = 12.25
30% tip on $40.08 = 12.02 30% tip on $40.33 = 12.10 30% tip on $40.58 = 12.17 30% tip on $40.83 = 12.25
30% tip on $40.09 = 12.03 30% tip on $40.34 = 12.10 30% tip on $40.59 = 12.18 30% tip on $40.84 = 12.25
30% tip on $40.10 = 12.03 30% tip on $40.35 = 12.11 30% tip on $40.60 = 12.18 30% tip on $40.85 = 12.26
30% tip on $40.11 = 12.03 30% tip on $40.36 = 12.11 30% tip on $40.61 = 12.18 30% tip on $40.86 = 12.26
30% tip on $40.12 = 12.04 30% tip on $40.37 = 12.11 30% tip on $40.62 = 12.19 30% tip on $40.87 = 12.26
30% tip on $40.13 = 12.04 30% tip on $40.38 = 12.11 30% tip on $40.63 = 12.19 30% tip on $40.88 = 12.26
30% tip on $40.14 = 12.04 30% tip on $40.39 = 12.12 30% tip on $40.64 = 12.19 30% tip on $40.89 = 12.27
30% tip on $40.15 = 12.05 30% tip on $40.40 = 12.12 30% tip on $40.65 = 12.20 30% tip on $40.90 = 12.27
30% tip on $40.16 = 12.05 30% tip on $40.41 = 12.12 30% tip on $40.66 = 12.20 30% tip on $40.91 = 12.27
30% tip on $40.17 = 12.05 30% tip on $40.42 = 12.13 30% tip on $40.67 = 12.20 30% tip on $40.92 = 12.28
30% tip on $40.18 = 12.05 30% tip on $40.43 = 12.13 30% tip on $40.68 = 12.20 30% tip on $40.93 = 12.28
30% tip on $40.19 = 12.06 30% tip on $40.44 = 12.13 30% tip on $40.69 = 12.21 30% tip on $40.94 = 12.28
30% tip on $40.20 = 12.06 30% tip on $40.45 = 12.14 30% tip on $40.70 = 12.21 30% tip on $40.95 = 12.29
30% tip on $40.21 = 12.06 30% tip on $40.46 = 12.14 30% tip on $40.71 = 12.21 30% tip on $40.96 = 12.29
30% tip on $40.22 = 12.07 30% tip on $40.47 = 12.14 30% tip on $40.72 = 12.22 30% tip on $40.97 = 12.29
30% tip on $40.23 = 12.07 30% tip on $40.48 = 12.14 30% tip on $40.73 = 12.22 30% tip on $40.98 = 12.29
30% tip on $40.24 = 12.07 30% tip on $40.49 = 12.15 30% tip on $40.74 = 12.22 30% tip on $40.99 = 12.30