Converting from float to percentage

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

Answer

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)