How do I add fractions?

First find a common denominator, then add the numerators and keep the denominator. For example, 1/4 + 1/2 becomes 1/4 + 2/4 = 3/4. The calculator does this automatically and simplifies the answer.

How do I convert a fraction to a decimal?

Divide the numerator by the denominator. For 3/4, that is 3 ÷ 4 = 0.75. This calculator shows the decimal equivalent of any fraction you enter.

How do I simplify a fraction?

Divide the numerator and denominator by their greatest common divisor. For 8/12, the GCD is 4, so the simplified form is 2/3. The calculator always returns results in lowest terms.

How do I multiply fractions?

Multiply straight across: multiply the numerators together and the denominators together, then simplify. For 2/3 × 3/4, you get 6/12, which simplifies to 1/2.

How do I divide fractions?

Invert the second fraction and multiply. For 1/2 ÷ 1/4, flip 1/4 to 4/1 and multiply: 1/2 × 4/1 = 4/2 = 2. This is why "keep, change, flip" is the common memory aid.

Fraction Calculator

Add, subtract, multiply, or divide fractions without the struggle. The fraction calculator takes two fractions, performs the operation you choose, simplifies the result, and shows the decimal equivalent.

How to Use the Fraction Calculator

Enter the numerator and denominator of each fraction.
Choose the operation (+ − × ÷).
Click Calculate to see the simplified result, decimal, and percentage.

How It Works

a/b + c/d = (ad + cb) / bd a/b − c/d = (ad − cb) / bd
a/b × c/d = ac / bd a/b ÷ c/d = ad / bc

Example: 1/2 + 1/3 = 3/6 + 2/6 = 5/6 ≈ 0.833.

Frequently asked questions

Everything you need to know about this calculator.

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How to Use the Fraction Calculator

How It Works

Frequently asked questions

How do I add fractions?

How do I convert a fraction to a decimal?

How do I simplify a fraction?

How do I multiply fractions?

How do I divide fractions?

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