Convert decimals to fraction of nearest 1/16 using Fraction.js

Question

I'm working on an old Angularjs app, and I need to be able to convert numbers in decimal format to fractions of the nearest 1/16. I've been searching for a few hours, and the one option I've found that seems to be the best is Fraction.js. However, when following examples such as here, I get improper fractions. For example:

  var convertToFraction = function (decimal) {
    // Round to the neareest 1/16
    var f = new Fraction(decimal);
    var newVal = f.toFraction();

    return newVal;
  };

I get 157293/2000" if I pass in a value of 78.6465, 3/2 if I pass in a value of 1.500. For the 78.6465, I would want to get 78 5/8.

Is there something else I need to do to get it to return the value in proper form, not improper fraction form? Also, do I need to do my own rounding of the decimal to the nearest 1/16 before passing the value to Fraction, like so?

  var convertToFraction = function (decimal) {
    // Round to the nearest 1/16
    var rounded = (Math.round(decimal * 16) / 16).toFixed(3);
    var f = new Fraction(rounded);
    var newVal = f.toFraction();
    return newVal;
  };

Even with that, I still get an improper format.

Answer 1

To get the proper fractions, I just had to pass the true argument to toFraction():

var newVal = f.toFraction(true);