How to turn input number into a percentage in python

Question

print ("How much does your meal cost")

meal = 0
tip = 0
tax = 0.0675

action = input( "Type amount of meal ")

if action.isdigit():
    meal = (action)
    print (meal)

tips = input(" type the perentage of tip you want to give ")


if tips.isdigit():
    tip = tips 
    print(tip)

I have written this but I do not know how to get

print(tip)

to be a percentage when someone types a number in.

Does this answer your question? [How to print a percentage value in python?](https://stackoverflow.com/questions/5306756/how-to-print-a-percentage-value-in-python) — Georgy, May 05 '20 at 13:16

score 22 · Answer 1 · answered Sep 22 '15 at 23:49

22

>>> "{:.1%}".format(0.88)
'88.0%'

answered Sep 22 '15 at 23:49

jfs

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score 2 · Answer 2 · answered Jan 25 '15 at 23:16

2

Based on your usage of input() rather than raw_input(), I assume you are using python3.

You just need to convert the user input into a floating point number, and divide by 100.

print ("How much does your meal cost")

meal = 0
tip = 0
tax = 0.0675

action = input( "Type amount of meal ")

if action.isdigit():
    meal = float(action)

tips = input(" type the perentage of tip you want to give ")

if tips.isdigit():
    tip = float(tips)  / 100 * meal
    print(tip)

answered Jan 25 '15 at 23:16

merlin2011

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@PadraicCunningham, You are correct that converting to an `int` will also work, but suppose the user decided they wanted to give `15.5%` tip? – merlin2011 Jan 25 '15 at 23:17
scratch that I thought you meant for division reasons. a while try/except might be a better option though – Padraic Cunningham Jan 25 '15 at 23:19
@PadraicCunningham, A very reasonable point, but I'm trying to address the question with as little change to the user's original code as possible. – merlin2011 Jan 25 '15 at 23:23
well +1 anyway it does answer the question. – Padraic Cunningham Jan 25 '15 at 23:24

score 2 · Answer 3 · edited Jan 25 '15 at 23:35

2

It will be

print "Tip = %.2f%%" % (100*float(tip)/meal)

The end %% prints the percent sign. The number (100*float(tip)/meal) is what you are looking for.

edited Jan 25 '15 at 23:35

Padraic Cunningham

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answered Jan 25 '15 at 23:21

Corrupted MyStack

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score 1 · Answer 4 · edited May 23 '17 at 12:34

We're assuming that it's a number the user is putting in. We want to make sure that the number is a valid percentage that the program can work with. I would recommend anticipating both expressions of a percentage from the user. So the user might type in .155 or 15.5 to represent 15.5%. A run-of-the-mill if statement is one way to see to that. (assuming you've already converted to float)

if tip > 1:
    tip = tip / 100

Alternatively, you could use what's called a ternary expression to handle this case. In your case, it would look something like this:

tip = (tip / 100) if tip > 1 else tip

There's another question here you could check out to find out more about ternary syntax.

How to turn input number into a percentage in python

4 Answers4