whole number and fraction

[DeaD_EyE]

Using decimal.Decimal(float) or fractions.Fraction(float) is not right.
The float you see is wrong. The representation is binary and can't represent all decimal fractions.
Avoid using float as value for Decimal or Fraction.

Compare the results:

print(fractions.Fraction(3, 10)) #right
print(fractions.Fraction('0.3')) #right
print(fractions.Fraction(0.3)) # wrong

The last result is wrong, because the literal 0.3 is converted to a binary fraction, which is very close to 0.3, but it is not real 0.3.