The last version of the constructor expects a string or unicode instance. (But see the documentation for the limit_denominator() method below.) Usual issues with binary floating-point (see Floating Point Arithmetic: Issues and Limitations), theĪrgument to Fraction(1.1) is not exactly equal to 11/10, and soįraction(1.1) does not return Fraction(11, 10) as one might expect. The next two versions acceptĮither a float or a decimal.Decimal instance, and return aįraction instance with exactly the same value. Other_fraction is an instance of numbers.Rational and returns aįraction instance with the same value. For example, if we have a bag of red, blue, and orange counters, we need to work out the fraction of red, blue, and orange counters. The ratio is still the same, so the pancakes should be just as yummy. In other words, 12 cups of flour and 8 cups of milk. The method is as follows: Step 1: Determine the fraction that makes up each quantity. To make pancakes for a LOT of people we might need 4 times the quantity, so we multiply the numbers by 4: 3 ×4 : 2 ×4 12 : 8. If we have a fraction, we can convert it to a ratio quite simply. Of numbers.Rational and returns a new Fraction instance Fraction to Ratio How to Convert a Fraction to a Ratio. The first version requires that numerator and denominator are instances Fraction ( other_fraction ) class fractions. Fraction ( numerator = 0, denominator = 1 ) ¶ class fractions. The fractions module provides support for rational number arithmetic.Ī Fraction instance can be constructed from a pair of integers, fromĪnother rational number, or from a string.
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