Comparision of number fractions

Question

Considering this topic in JS(and in other languages) can we guarantee that fractions that can be simplified to the same number will be always the same in JS? For example expressions like

1/3 === 3/9; 3/9 === 6/18; 6/18 === 9/27; 9/27 === 27/81; // etc should they always return true?

Answer 1

Yes considering that you can't guarantee because there's a limit to the accuracy. Example:

var factor = 283763287462387;
var x = 15 / 7
var y = 15 * factor / 7 * factor;
console.log(x === y)