How are fractions simplified?

The result's numerator and denominator are divided by their greatest common divisor (GCD), so you always get the fraction in lowest terms — for example 4/8 simplifies to 1/2.

What's a mixed number?

A mixed number combines a whole number and a proper fraction, like 1 1/2 instead of 3/2 — the calculator shows both forms so you can use whichever is more useful.

Can I use negative fractions?

Yes — enter a negative numerator or denominator and the sign is normalized onto the numerator automatically in the simplified result.

Why can't the denominator be zero?

Division by zero is undefined, so a fraction with a zero denominator has no value — the calculator flags this instead of showing a misleading result.

FRACTION CALCULATOR

Add, subtract, multiply, or divide fractions. Nothing leaves your browser.

Fraction 1

Fraction 2

Result5/6

Mixed number5/6

Decimal0.833333

How to calculate with fractions

1
Enter the numerator and denominator of the first fraction.
2
Choose an operation: add, subtract, multiply, or divide.
3
Enter the numerator and denominator of the second fraction.
4
Read the simplified result, its mixed-number form, and the decimal equivalent.

Questions

How are fractions simplified?: The result's numerator and denominator are divided by their greatest common divisor (GCD), so you always get the fraction in lowest terms — for example 4/8 simplifies to 1/2.
What's a mixed number?: A mixed number combines a whole number and a proper fraction, like 1 1/2 instead of 3/2 — the calculator shows both forms so you can use whichever is more useful.
Can I use negative fractions?: Yes — enter a negative numerator or denominator and the sign is normalized onto the numerator automatically in the simplified result.
Why can't the denominator be zero?: Division by zero is undefined, so a fraction with a zero denominator has no value — the calculator flags this instead of showing a misleading result.