Support: Fraction Calculator

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Common questions

How do you add fractions with different denominators?

Find the least common multiple of the denominators, rewrite each fraction over it, then add the numerators. For 1/2 + 1/3, the common denominator is 6, so 3/6 + 2/6 = 5/6.

How do you multiply fractions?

Multiply the numerators together and the denominators together, then simplify. 2/3 × 3/4 = 6/12 = 1/2.

How do you divide fractions?

Flip the second fraction and multiply. 1/2 ÷ 1/4 = 1/2 × 4/1 = 2.

How do I type a mixed number?

Put a space between the whole number and the fraction: 2 1/3. A hyphen, 2-1/3, works too.

How do you simplify a fraction?

Divide the top and bottom by their greatest common factor. For 18/24 it is 6, so 18/24 = 3/4.

How do I turn a decimal into a fraction?

Write it over 10, 100 or 1,000 according to the number of decimal places, then simplify: 0.375 = 375/1000 = 3/8. Choose Decimal ⇄ fraction and type the decimal.

How do I enter a repeating decimal?

Put the digits that repeat in brackets: 0.(3) for 0.333… or 0.1(6) for 0.1666…. The calculator turns it into the exact fraction, 1/3 or 1/6.

Is anything sent anywhere?

No. The sums run in your browser and nothing you type is sent to us or stored.