How do i convert a float to a percent in python?

I would like to convert a decimal number [say 0.33333] to percentage [expected answer 33.33%]

I used the following

x = 0.3333

print[format[x,'.2%']]

which gives indeed 33.33%

However, the result is a string, I would like it to still be a number [in % format] to be able to perform mathematical operations on it [e.g. format[x,'.2%']*2 to give 66.66%

But this throws an exception as 33.33% is a string

rdas

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asked Jun 1, 2019 at 21:49

4

An idea is to create a custom datatype, I'll call it Percent, which inherit everything from float, but when you want to use it as a string it shows a % and multiplies the number with 100.

class Percent[float]:
    def __str__[self]:
        return '{:.2%}'.format[self]
x = Percent[0.3333]
print[x]
# 33.33%

If you want to represnt the value in envoirment like jupyter notebook in your format you can add same method with the name __repr__ to Percent Class:

def __repr__[self]:
    return '{:.2%}'.format[self]

user35443

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answered Jun 1, 2019 at 22:31

MehdiMehdi

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I made it on a single line like:

x = 0.333
print[str[int[x*100]] + "%]

answered Feb 12, 2021 at 22:36

1

x = 0.3333

print['{:,.2%}'.format[x]]  # Prints percentage format, retains x as float variable

Outputs 33.33%

answered Apr 23, 2021 at 23:09

Use f-strings! [python >= 3.6]

x = 0.3333

print[f"{x:,.2%}"]

That is: print x, to 2 decimal places, and add the % symbol at the end. x is not altered by the f-string.

answered Jun 5 at 2:49

vtnatevtnate

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x = 0.3333

print[format[x,'.2%']]

class Percent[float]:
    def __str__[self]:
        return '{:.2%}'.format[self]
x = Percent[0.3333]
print[x]
# 33.33%

def __repr__[self]:
    return '{:.2%}'.format[self]

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