What's a 30% Tip on a $31 Bill?

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Bill
$
Tip
%
Split? ways
Bill: $31.00
Tip: $9.30
Total: $40.30
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 $31.00 = 9.30 30% tip on $31.25 = 9.38 30% tip on $31.50 = 9.45 30% tip on $31.75 = 9.53
30% tip on $31.01 = 9.30 30% tip on $31.26 = 9.38 30% tip on $31.51 = 9.45 30% tip on $31.76 = 9.53
30% tip on $31.02 = 9.31 30% tip on $31.27 = 9.38 30% tip on $31.52 = 9.46 30% tip on $31.77 = 9.53
30% tip on $31.03 = 9.31 30% tip on $31.28 = 9.38 30% tip on $31.53 = 9.46 30% tip on $31.78 = 9.53
30% tip on $31.04 = 9.31 30% tip on $31.29 = 9.39 30% tip on $31.54 = 9.46 30% tip on $31.79 = 9.54
30% tip on $31.05 = 9.32 30% tip on $31.30 = 9.39 30% tip on $31.55 = 9.47 30% tip on $31.80 = 9.54
30% tip on $31.06 = 9.32 30% tip on $31.31 = 9.39 30% tip on $31.56 = 9.47 30% tip on $31.81 = 9.54
30% tip on $31.07 = 9.32 30% tip on $31.32 = 9.40 30% tip on $31.57 = 9.47 30% tip on $31.82 = 9.55
30% tip on $31.08 = 9.32 30% tip on $31.33 = 9.40 30% tip on $31.58 = 9.47 30% tip on $31.83 = 9.55
30% tip on $31.09 = 9.33 30% tip on $31.34 = 9.40 30% tip on $31.59 = 9.48 30% tip on $31.84 = 9.55
30% tip on $31.10 = 9.33 30% tip on $31.35 = 9.41 30% tip on $31.60 = 9.48 30% tip on $31.85 = 9.56
30% tip on $31.11 = 9.33 30% tip on $31.36 = 9.41 30% tip on $31.61 = 9.48 30% tip on $31.86 = 9.56
30% tip on $31.12 = 9.34 30% tip on $31.37 = 9.41 30% tip on $31.62 = 9.49 30% tip on $31.87 = 9.56
30% tip on $31.13 = 9.34 30% tip on $31.38 = 9.41 30% tip on $31.63 = 9.49 30% tip on $31.88 = 9.56
30% tip on $31.14 = 9.34 30% tip on $31.39 = 9.42 30% tip on $31.64 = 9.49 30% tip on $31.89 = 9.57
30% tip on $31.15 = 9.35 30% tip on $31.40 = 9.42 30% tip on $31.65 = 9.50 30% tip on $31.90 = 9.57
30% tip on $31.16 = 9.35 30% tip on $31.41 = 9.42 30% tip on $31.66 = 9.50 30% tip on $31.91 = 9.57
30% tip on $31.17 = 9.35 30% tip on $31.42 = 9.43 30% tip on $31.67 = 9.50 30% tip on $31.92 = 9.58
30% tip on $31.18 = 9.35 30% tip on $31.43 = 9.43 30% tip on $31.68 = 9.50 30% tip on $31.93 = 9.58
30% tip on $31.19 = 9.36 30% tip on $31.44 = 9.43 30% tip on $31.69 = 9.51 30% tip on $31.94 = 9.58
30% tip on $31.20 = 9.36 30% tip on $31.45 = 9.44 30% tip on $31.70 = 9.51 30% tip on $31.95 = 9.59
30% tip on $31.21 = 9.36 30% tip on $31.46 = 9.44 30% tip on $31.71 = 9.51 30% tip on $31.96 = 9.59
30% tip on $31.22 = 9.37 30% tip on $31.47 = 9.44 30% tip on $31.72 = 9.52 30% tip on $31.97 = 9.59
30% tip on $31.23 = 9.37 30% tip on $31.48 = 9.44 30% tip on $31.73 = 9.52 30% tip on $31.98 = 9.59
30% tip on $31.24 = 9.37 30% tip on $31.49 = 9.45 30% tip on $31.74 = 9.52 30% tip on $31.99 = 9.60