define(function(require, exports, module) {
'use strict';

/**
 * Returns aspect ratio string.
 *
 * Makes use of Euclid's GCD algorithm,
 * http://en.wikipedia.org/wiki/Euclidean_algorithm
 *
 * @param  {Number} w
 * @param  {Number} h
 * @return {String}
 */
module.exports = function(w, h) {
  var gcd = function(a, b) { return (b === 0) ? a : gcd(b, a % b); };
  var divisor = gcd(w, h);
  return (w / divisor) + ':' + (h / divisor);
};

});