Fraction Calculator

Enter two fractions (like 3/4 or -5/2), pick an operation and press Calculate. The answer is always fully simplified.

Fractions like 3/4, whole numbers or decimals

Result

Enter values and press Calculate to see the result.

Formula

ab+cd=ad+bcbd\frac{a}{b} + \frac{c}{d} = \frac{ad + bc}{bd}

To add or subtract, rewrite both fractions over a common denominator first.

ab÷cd=ab×dc\frac{a}{b} \div \frac{c}{d} = \frac{a}{b} \times \frac{d}{c}

Dividing by a fraction is the same as multiplying by its reciprocal.

How to use this calculator

  1. Type each fraction with a slash, e.g. 3/4. Whole numbers and decimals work too.
  2. Choose the operation and press Calculate.
  3. For improper results you also get a mixed number, e.g. 7/3 = 2 1/3.

Worked example

Add 1/2 and 1/3

The least common denominator of 2 and 3 is 6.

1/2 = 3/6 and 1/3 = 2/6, so the sum is 5/6.

Frequently asked questions

How do I enter a mixed number like 2 1/3?

Convert it to an improper fraction first: 2 1/3 = 7/3. The answer shows mixed numbers for you.

Is the answer simplified?

Yes. Results are always reduced to lowest terms by dividing by the greatest common divisor.

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