You can use Erik Garrison’s fraction.js library to do that and more fractional operations. var f = new Fraction(2, 10000); console.log(f.numerator + “https://stackoverflow.com/” + f.denominator); To to do .003 you can just do var f = new Fraction(.003); console.log(f.numerator + “https://stackoverflow.com/” + f.denominator);
Sometimes you need to find a way to do it and rounding is acceptable. So if you decide what range of rounding works out for you you can build a function like this. To convert a decimal into the fraction that it most closely matches. You can extend the accuracy by adding more denominators to … Read more
Historical note: the comment thread below may refer to first and second implementations. I swapped the order in September 2017 since leading with a buggy implementation caused confusion. If you want something that maps “0.1e-100” to 101, then you can try something like function decimalPlaces(n) { // Make sure it is a number and use … Read more
You can’t. You would need to write a class dedicated to holding rational numbers (i.e. fractions). Or maybe just use the Boost Rational Number library.
Try the following: 1<sup>1</sup>⁄<sub>2</sub> This displays as: 11⁄2
1) This uses strapplyc to extract the numbers and then calc puts them in standard form, converts them to numeric and performs the calculation: library(gsubfn) ff <- c(‘1 1/2’, ‘2 3/4’, ‘2/3′, ’11 1/4’, ‘1’) calc <- function(s) { x <- c(if (length(s) == 2) 0, as.numeric(s), 0:1) x[1] + x[2] / x[3] } sapply(strapplyc(ff, … Read more
If you want to display the results of calculations as rational numbers then the only 100% correct solution is to use rational arithmetic throughout all calculations, i.e. all intermediate values are stored as a pair of integers (numerator, denominator), and all additions, multiplications, divisions, etc are done using the rules for rational numbers. As soon … Read more
On reflection, Unicode fractions among the Latin-1 Supplement and Number Forms offer limited coverage, and fancy equations may be overkill. This example uses HTML in Swing Components. Addendum: The approach shown lends itself fairly well to rendering mixed numbers. For editing, key bindings to + and / could be added for calculator-style input in a … Read more
// Reduce a fraction by finding the Greatest Common Divisor and dividing by it. function reduce(numerator,denominator){ var gcd = function gcd(a,b){ return b ? gcd(b, a%b) : a; }; gcd = gcd(numerator,denominator); return [numerator/gcd, denominator/gcd]; } reduce(2,4); // [1,2] reduce(13427,3413358); // [463,117702]
You have two options: Use float.as_integer_ratio(): >>> (0.25).as_integer_ratio() (1, 4) (as of Python 3.6, you can do the same with a decimal.Decimal() object.) Use the fractions.Fraction() type: >>> from fractions import Fraction >>> Fraction(0.25) Fraction(1, 4) The latter has a very helpful str() conversion: >>> str(Fraction(0.25)) ‘1/4’ >>> print Fraction(0.25) 1/4 Because floating point values … Read more