Convert a number to a fraction in JavaScript

convert-number-to-fraction.js

/**
 * Converts numbers to fractions:
 * - 1.25 to 1 1/4
 * - 2 to 2
 */
var numberToFraction = function( amount ) {
	// This is a whole number and doesn't need modification.
	if ( parseFloat( amount ) === parseInt( amount ) ) {
		return amount;
	}
	// Next 12 lines are cribbed from https://stackoverflow.com/a/23575406.
	var gcd = function(a, b) {
		if (b < 0.0000001) {
			return a;
		}
		return gcd(b, Math.floor(a % b));
	};
	var len = amount.toString().length - 2;
	var denominator = Math.pow(10, len);
	var numerator = amount * denominator;
	var divisor = gcd(numerator, denominator);
	numerator /= divisor;
	denominator /= divisor;
	var base = 0;
	// In a scenario like 3/2, convert to 1 1/2
	// by pulling out the base number and reducing the numerator.
	if ( numerator > denominator ) {
		base = Math.floor( numerator / denominator );
		numerator -= base * denominator;
	}
	amount = Math.floor(numerator) + '/' + Math.floor(denominator);
	if ( base ) {
		amount = base + ' ' + amount;
	}
	return amount;
};

That is DOPE bro ! thanks