Fraction ↔ Decimal ↔ Percent Converter

About this tool

Type a value into the fraction, decimal, or percent field and see the other two update instantly, with the fraction automatically simplified to its lowest terms.

Frequently asked questions

How is the fraction simplified?

By dividing both the numerator and denominator by their greatest common divisor (GCD) — for example, 6/8 simplifies to 3/4.

What happens with repeating decimals?

Decimals are shown rounded to a reasonable number of places (like 0.333... for 1/3 shown as 0.3333), since a fraction like 1/3 can't be represented exactly in decimal form.

Can the denominator be zero?

No — a zero denominator is mathematically undefined, so it's treated as invalid input.