Convert Fraction String to Decimal?

Question

I\'m trying to create a javascript function that can take a fraction input string such as \'3/2\' and convert it to decimal—either as a string \'1.5\'

Answer 1

I have a function I use to handle integers, mixed fractions (including unicode vulgar fraction characters), and decimals. Probably needs some polishing but it works for my purpose (recipe ingredient list parsing).

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Inputs "2 1/2", "2½", "2 ½", and "2.5" will all return 2.5. Examples:

var numQty = require("numeric-quantity");

numQty("1 1/4") === 1.25;  // true
numQty("3 / 4") === 0.75;  // true
numQty("¼" ) === 0.25;     // true
numQty("2½") === 2.5;      // true
numQty("¾") === 0.75;      // true
numQty("⅓") === 0.333;     // true
numQty("⅔") === 0.667;     // true

One thing it doesn't handle is decimals within the fraction, e.g. "2.5 / 5".