Fraction Calculator

Use this fraction calculator to add, subtract, multiply and divide fractions and mixed numbers, with simplified answers.

What Is a Fraction Calculator?

A fraction calculator adds, subtracts, multiplies and divides fractions and mixed numbers, then simplifies the answer for you. Enter a whole number, numerator and denominator for each fraction, choose an operation and see the result as a simplified fraction, a mixed number and a decimal.

How to Add and Subtract Fractions

To add or subtract, the fractions need a common denominator. For 1/2 + 1/3, the common denominator is 6, so the problem becomes 3/6 + 2/6 = 5/6. This calculator finds the common denominator automatically and reduces the answer to lowest terms.

How to Multiply Fractions

Multiply the numerators together and the denominators together. For example, 3/4 x 2/3 = 6/12, which simplifies to 1/2. There is no need for a common denominator.

How to Divide Fractions

To divide, flip the second fraction and multiply. For 3/4 / 1/2, you calculate 3/4 x 2/1 = 6/4, which simplifies to 3/2 or 1 1/2.

Working With Mixed Numbers

A mixed number combines a whole number and a fraction, such as 2 1/4. The calculator converts mixed numbers to improper fractions (2 1/4 becomes 9/4), performs the operation and converts the answer back to a mixed number.

How to Simplify a Fraction

Find the greatest common divisor (GCD) of the numerator and denominator and divide both by it. For 18/24, the GCD is 6, so the simplified fraction is 3/4. Results here are always shown in lowest terms.

Frequently Asked Questions

How do I convert a fraction to a decimal?

Divide the numerator by the denominator. For 3/8, 3 divided by 8 is 0.375.

What is an improper fraction?

It is a fraction whose numerator is larger than its denominator, such as 7/4. It equals the mixed number 1 3/4.

Can the denominator be zero?

No. Division by zero is undefined, and the calculator will warn you.

Results are simplified automatically.