Fraction Simplifier

Simplify any fraction to its lowest terms by dividing both numerator and denominator by their Greatest Common Divisor (GCD). The result is also shown as a decimal and a percentage.

Simplified
3/2
Decimal
1.5
Percentage
150 %

How it works

The GCD (Greatest Common Divisor) is the largest number that divides both the numerator and denominator exactly. Dividing both by the GCD gives the simplest equivalent fraction.

Formula
GCD(a, b) = Euclidean algorithm | Simplified = (a/GCD) / (b/GCD)

Example. 12/8: GCD(12,8) = 4, so 12/8 = 3/2 = 1.5 = 150%.

Frequently asked questions

What does 'simplest form' mean?

A fraction is in simplest form (lowest terms) when the numerator and denominator share no common factor other than 1. For example, 3/2 is in simplest form but 6/4 is not (both divisible by 2).

Related calculators

Percentage CalculatorFree percentage calculator. Find what percentage one number is of another, work out X% of Y, and calculate the increase or decrease between two values.Quadratic Equation CalculatorSolve any quadratic equation ax² + bx + c = 0 instantly. Get the discriminant, both roots (real or complex) and the nature of the solution.Random Number GeneratorGenerate one or more random numbers within any range, with or without duplicates. Instant, free, no signup.Ratio CalculatorSimplify a ratio to its lowest terms, or solve a proportion (A:B = C:?) for the missing value. Instant results.

Embed this calculator

Free to use on any site. Please keep the credit link.

<iframe
  id="letmecalc-fraction-calculator"
  src="https://letmecalc.com/embed/math/fraction-calculator"
  title="Fraction Simplifier"
  width="100%"
  height="620"
  style="border:0;max-width:100%"
  loading="lazy"
></iframe>
<p><a href="https://letmecalc.com/math/fraction-calculator" target="_blank" rel="noopener">Fraction Simplifier</a> by letmecalc</p>
<script>
(function () {
  var f = document.getElementById("letmecalc-fraction-calculator");
  window.addEventListener("message", function (e) {
    if (e.origin !== "https://letmecalc.com") return;
    if (!f || e.source !== f.contentWindow) return;
    var d = e.data;
    if (!d || d.source !== "letmecalc-embed" || d.type !== "resize") return;
    if (typeof d.height === "number" && d.height > 0) {
      f.style.height = d.height + "px";
    }
  });
})();
</script>