Fraction Calculator
Add, subtract, multiply, or divide two fractions. Result is simplified, mixed, and decimal.
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How to use Fraction Calculator
- Choose operation first so the fields that apply to that job appear.
- Enter numerator a, denominator a, numerator b. Leave a field blank only when the page says the value is missing.
- Read the result rows under the form. Errors appear in the status line. Nothing is uploaded.
- Rounding follows IEEE floating point in this browser unless the page says it uses integers or BigInt.
Fraction Calculator
Four operations
| Computes | Add, subtract, multiply, or divide two fractions. Result is simplified, mixed, and decimal. |
|---|---|
| Includes | Four operations |
| Includes | Simplify |
| Engine | percentage |
| Upload | None |
| Advice | Arithmetic only |
What Fraction Calculator is
Addition uses a common denominator: a/b + c/d = (ad + bc) / bd, then reduce. Division is multiply by the reciprocal. Denominator 0 is rejected.
The formula runs in this tab. CZNull does not receive the numbers.
How this page computes
Mixed numbers convert on the mixed number page. Decimals convert on decimal to fraction.
Entities and related jobs
Add, subtract, multiply, or divide two fractions. Result is simplified, mixed, and decimal. Named features: Four operations, Simplify.
See also Mixed Number Calculator, Decimal to Fraction Calculator, Fraction to Decimal Calculator, Percentage to Fraction, Percentage Calculator, Scientific Calculator.
Use cases
Homework, carpentry cuts in inches, and recipes. This is exact rational arithmetic, not a CAS.
Limits
Invalid input appears in the status line. IEEE floating point applies unless a row says otherwise. CZNull does not receive the numbers.