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Calculate with fractions

Type an expression such as 1 1/2 + 3/4, with parentheses and negatives if needed. The result is exact, with the working shown step by step.

Runs on your device
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How to use

  1. Enter an expression such as 1 1/2 + 3/4.
  2. Read the result as a fraction, mixed number and decimal, with steps.

Worked example

1/3 + 1/4 = 4/12 + 3/12 = 7/12 ≈ 0.5833.

Supported formats and limits

InputFractions, mixed numbers, decimals
OutputSimplified fraction, mixed number, decimal, steps
EngineBigInt rational arithmetic with gcd simplification

Limitations

  • Repeating decimals are shown rounded; the fraction is exact.

Questions

How are repeating decimals shown?

The fraction is always exact. The decimal form marks the repeating block when there is one, and rounding is done exactly rather than with floating-point numbers.

Can I enter decimals?

Yes. Decimals are converted to exact fractions, so 0.25 + 1/3 gives 7/12. Division by zero and syntax problems are reported.

Privacy

Runs on your device. Files and text are processed in this browser tab and are not uploaded.

See the privacy policy for how toolsdocks handles data.